Malicious PDF — malware analysis report

Static analysis result for SHA-256 45020f970e12b8c6…

MALICIOUS

PDF

84.4 KB Created: 2021-08-03 23:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ebc1e8460057e54dfa5234bbf9dbfaf SHA-1: 10b1135bda758b591e81a4ac9bc56a2bd31e1e1a SHA-256: 45020f970e12b8c6e3c833eaa74f2cc6270afea778c9646c476c3e5629bc7d4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to various external sites, some of which are hosted on compromised CMS platforms. The presence of numerous external links suggests an attempt to lure users to malicious or compromised websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://naturalmis.com/userfiles/file/87288317205.pdf In PDF document text
    • http://barcabianca.eu/upload/file/85878727512.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202108021906184263.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcda4e2d06d---neburuxidosamugire.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/fda87b7c2c7efb05d81dceefa088ccf2/83161659808.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077ffc87fdc6---zovisudefugafurad.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/49440693612.pdfIn PDF document text
    • https://keongracun.org/contents//files/40699980701.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/gukufupubum.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085597101462---82618026151.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/pogoguketibojabuvukub.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/96479593226.pdfIn PDF document text
    • https://khanikango.in/file/xuketasufodakanexomepaxi.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/534g6dj13i6jbv9r76l340km72/91450060865.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d663467e---bulag.pdfIn PDF document text
    • http://castel.lu/userfiles/files/80628050955.pdfIn PDF document text
    • http://mav-auto.ru/images/file/17677422722.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbadaacf54a---xevamalulu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b1ec36507257a2395fda86686ad2e780/85190045235.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/remetekewuwudexadeso.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf3ab771d7---fadizoxasuletiluvatukog.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c5f4ec388e03cd71562aace16efffa25/20690754543.pdfIn PDF document text
    • http://casaalu.com/luutru/files/78531392045.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ebq4m6up9grg63jv0u2a2ejes7/terajunitevizoto.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/65363952259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=polaris+atv+service+manual+pdfPDF 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_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 10948 bytes
SHA-256: 62a4d6942461854573d3f81d12cc7976afc09230ad38c99e52c587c8c796e25d
font_02_sfnt_off00011833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11833 16880 bytes
SHA-256: d4f51b330436a4a51ecb6d05d0eca3e636962c8fb065ffad8f80a42537feed88

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