Malicious PDF — malware analysis report

Static analysis result for SHA-256 92563b9d1486246d…

MALICIOUS

PDF

103.0 KB Created: 2021-02-26 19:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3f271be0190e3adcd9b708e55c9ee712 SHA-1: 94f1bda0adda9f95b949233d699c34067a556a8d SHA-256: 92563b9d1486246de088e03075d3a5fdaebc519c4bb8a84a98c7ee83e6f185ff
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://lozipotod.ru/wix?keyword=ingroup+bias+experiments PDF link annotation
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/9149702.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/jegizujogop.pdfIn PDF document text
    • http://mexicotop.xyz/cartas_a_una_joven_psicologa_deshgppd.pdfIn PDF document text
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/87ab6a79.pdfIn PDF document text
    • https://lumezoti.weebly.com/uploads/1/3/4/8/134863392/jusajigorixun.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/hdjhtgd/indoor_rock_climbing_prescott_az.pdfIn PDF document text
    • https://gegiwozik.weebly.com/uploads/1/3/4/7/134719936/tovep_finegetivinoti_walas.pdfIn PDF document text
    • http://circleshtang.xyz/transmissive_reflective_structural_color_filters_theory_and_applicationsu3p0e.pdfIn PDF document text
    • http://polfact.site/97829476989apnz.pdfIn PDF document text
    • http://gbarb.me/kali_linux_virtualbox_default_username_and_password4xxyx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fosagobomap/99196110010.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/resident_evil_movies_collection_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/92850396243.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/receipt_template_invoice_home.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EA 5132 bytes
SHA-256: 24ec8b94fcf7d27156cffb660a52b31300e991218839ff8450482d481ddf495f
font_01_sfnt_off00015a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A42 11924 bytes
SHA-256: 7705b2a950c0febe39fe58b02703cfaf661c009a65b4879a483573ce839a6faa
font_02_sfnt_off000180d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180D2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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