Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f62901968d9e4bc…

MALICIOUS

PDF

74.8 KB Created: 2021-03-19 08:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e447c328c152f070321c68f00a071375 SHA-1: 619531bf7a3f87c97ee9a04d0edafbff2771a3ac SHA-256: 3f62901968d9e4bc17b1c92f93b30b73a503b7e598a1ff8e9e5e8842a398389e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded external links, many pointing to disposable domains and Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains a title related to 'John Dean to testify against Kavanaugh', likely a lure to attract clicks. The presence of numerous external links indicates an attempt to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=john+dean+to+testify+against+kavanaugh PDF link annotation
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/ca51f2888.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/7859088144.pdfIn PDF document text
    • https://vodemiteju.weebly.com/uploads/1/3/4/7/134722100/bc475c15.pdfIn PDF document text
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/bitado-tamufokevo-jutid-tuforib.pdfIn PDF document text
    • https://gafanotode.weebly.com/uploads/1/3/4/5/134576189/b187b6009c7d82.pdfIn PDF document text
    • https://winalefumigis.weebly.com/uploads/1/3/1/4/131437210/wusawixumelizax-topakalozaro-katozeja.pdfIn PDF document text
    • http://nat-fru.space/laridivwbr7c.pdfIn PDF document text
    • https://kaxaxelakag.weebly.com/uploads/1/3/4/2/134235500/kerolusisel.pdfIn PDF document text
    • http://xitnet.fun/4681824505337zae.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/3172692.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/4535500.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/how_to_use_treadmill_without_ifit.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/9091198.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/jubita-setojaxon.pdfIn PDF document text
    • https://girusidopot.weebly.com/uploads/1/3/0/7/130738876/masajokel-rosonufedozom-tawelezos.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/5552292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimofulun.rf.gd/convertir_mm_a_pulgadas_cuadradas.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/graphic_novel_definition_literature.pdfIn PDF document text
    • http://rajamuviw.epizy.com/towibe.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/fundamentals_of_deep_learning_nikhil_buduma_free_download.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 5256 bytes
SHA-256: a86db9c3e50b4e09f5b5b54100c53a6ea28a5b4f6c65ec02b9ae7deaa2844cf5
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 10648 bytes
SHA-256: 41fd5eccc551ac174b720b646fe2f30fdfed5316ba3ee6705441cb6cd344f2ec

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