Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29072554de5c838…

MALICIOUS

PDF

82.1 KB Created: 2021-04-15 21:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a13495c9976c59115772fc2ac85a6415 SHA-1: 51a81544ba5bccae40119ac6551737157dc0d2bd SHA-256: d29072554de5c8384c88d64b750a8854c67ce2fe0481b30e704c9e89fa09fd49
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://resalured.ru/strik?utm_term=international+journal+of+medical+toxicology+and+legal+medicine+impact+factor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374545/normal_6046fa4c4c6f9.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/7543058.pdfIn PDF document text
    • https://xidibifolun.weebly.com/uploads/1/3/2/7/132710634/pibigarugutoz-sipimumewezopa-disadimit.pdfIn PDF document text
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/abcde232dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_605baa1a07495.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/5580528.pdfIn PDF document text
    • https://lolaxazexujobiw.weebly.com/uploads/1/3/4/7/134762367/c3e0a2dfb79c08d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5fee4e85bf64c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_6002b65de2514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_604ca29a86672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_6014bc7912246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_6060a77b5d6f5.pdfIn PDF document text
    • https://sukivafuxek.weebly.com/uploads/1/3/0/8/130874221/99352963edfac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_603366dd67447.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/jonubimo-dagurinolunevin-fuxiwobi.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/zoluwivebiro/vigijadujemibowiwofo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/99078447209.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/how_much_calories_in_common_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/can_i_use_roku_remote_app_without_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/rupemudugutadagaxobab.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/receptionist_assessment_test_answers_indeed.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/dijopedugupebaze.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/daxokibunemuzoz.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_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 5360 bytes
SHA-256: bdaf527250d6636f730620d21bb0cddef41a45a097c25773492e24a9c1a6f2a3
font_01_sfnt_off00010692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10692 10928 bytes
SHA-256: b0bfd3362f852cc235c24134f626115529a4ce9d2c24614254cdf8ad3d7afbc1
font_02_sfnt_off00012bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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