Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaaf8419b4f454d8…

MALICIOUS

PDF

82.1 KB Created: 2021-08-05 21:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 41b7fb37a323acdf6e9118db058f8991 SHA-1: a2f920bd87a4c048bf8b4d21893468fa9e237148 SHA-256: aaaf8419b4f454d8b06797a635e7767b5bc8abb76935ff6f87b5635bf10dad26
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 https://crewmak.ru/uplcv?utm_term=how+to+use+the+magic+bullet+juicer+attachment PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca10eb17d6---14821426684.pdfPDF link annotation
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/unqne2rrtpunj4787plhct4bf8/rizadokud.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607af070750b3---34725752034.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/33182792670.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/wejeriluvedusaminugulos.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/q0mvc87tfml0t83a3no7r9dttf/26884984025.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/zufugi.pdfIn PDF document text
    • http://nprofit.hk/userfiles/59501664259.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/82715896757.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607895acf2446---webaxuxawizukekogap.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/rsa6ocbn41voh3csj3mpskggct/77999549842.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cafe38a42a1b52c4002944730989bd3d/wegoliporadosuriz.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/jeveradaviroreb.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d8a50d91f---52028741670.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/78803440844.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da9dd3e84bd---30557406206.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086a6040a003---rumiguvorivatunebegazise.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/budakonuxo.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/zupabibutovufabuteted.pdfIn PDF document text
    • http://dbhsreunion.com/clients/21010/File/74230888902.pdfIn PDF document text
    • http://gibisch.info/files/files/39022582932.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/67522726b32ca48f15842b0e52826828/97628386159.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/54738467094.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7vh5bf7t94imuif1c2dmk2n963/59688901747.pdfIn PDF document text
    • http://ridendo.cz/files/file/15126704952.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60e59ed43---vubexojuzonarap.pdfIn PDF document text
    • 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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 17760 bytes
SHA-256: c062bad34aa1051ae81b2696a2a795725110e6ccb5483e2f5b89bb127b8654b8
font_02_sfnt_off0001205e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205E 11124 bytes
SHA-256: 8280ce815b8bc6175bed66c5b6509268d74bf919ae0c2f55e5143995e4219a5e