Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3219d3c914b8731…

MALICIOUS

PDF

87.9 KB Created: 2021-06-25 21:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c675f02d4a00b3720acf605f8d0dc1bb SHA-1: 48720a395729e4bc959bea220359277bc64706f4 SHA-256: a3219d3c914b87311a4cc1f1cb70f599125abf293c08b1d802bce4bb41c60138
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and numerous links pointing to compromised WordPress sites. The primary malicious URL identified is http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/g05ol21vssi8ckkvp32gafbes0/lebuluzesotamoxanutovivix.pdf, which likely serves as a download point for a secondary payload. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://asbazainville.org/userfiles/file/jikejedorelowenemilomale.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f51c0a24b---kakusupikigut.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/50oq40fmhfm6e0cojh57nfuvqc/9464469585.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3032b53928---95509858026.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7cf842d16658d51141c7ac8f4005ef96/83527468166.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a10d0e55ba---94549100973.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fawonebelupamekoporeserow.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fce46c17b---95531885691.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/57040106322.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jokebinu.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/64959924799.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/g05ol21vssi8ckkvp32gafbes0/lebuluzesotamoxanutovivix.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ceb21a545ef9632263ad7db08bf88345/dotorekuxus.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/dapatugikafodejeketigil.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/fe350f99ae09d4636c8ad6348c7f8d4d/riverugamevopadajopi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608e511a694bc---94439000594.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/90663179477.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d7fcd2db---tukowefuzaxobuwadezud.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/tofejifedarefez.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8abf2f225---vobababelipitexogobaf.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/0b964d0d99151589094c3b067d08a496/40200912299.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52cdb12c7---jotorebaxegew.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/25a49fdba4a73384f04d99406bf2c579/zivusulod.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/64297850222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=push+the+envelope+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 17432 bytes
SHA-256: 35cca5916c8f7285ce4f75db0e05403e71ca9391bca8a53242f949605bd9f89b
font_01_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 10764 bytes
SHA-256: 58be8fb1f6b259a95e857e16469acf46ac17301893d04797076c17936c2ef983
font_02_sfnt_off000138a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1