Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b99114a2f31ba7…

MALICIOUS

PDF

89.0 KB Created: 2021-03-28 11:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af51144970e9751979cbcad50eb46a56 SHA-1: 9e43f85d8eed6e56abd18e98a2c385689809dca3 SHA-256: e7b99114a2f31ba7687763713f0744c8f07612719e78a5008ee3c3035861244d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://maypoin.ru/award?keyword=easy+fingerstyle+guitar+songs+pdf PDF link annotation
    • https://cdn.sqhk.co/kimazibo/aien8hf/pexepigikewilogujobam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_5fd2ab1c9ea15.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/esl_crossword_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369771/normal_5ff51b7777e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5ff8da52166c4.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/baixar_carrie_a_estranha.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff6173526699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_6040092c334a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fc6b688acced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_60472cbc45777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/bose_universal_remote_codes_for_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/59735027768.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_16ff09a7b54e4474aacb5e44592ae425.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_aeddbcc58f714f0b9a6b0623c123044f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farowug/99713162072.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_a18af84c0e9441afa18d1e51a43a59e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/rexalamotijumuzibota.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_6994ca845d7c4adb96a641bbd463a985.pdf?index=trueIn PDF document text
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_fd072f7119fb41e49ba3d0c231683b35.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 5268 bytes
SHA-256: 519d5e328c10ca5152670abb80f206db6b5e7fa1148bebc7b49168318199b516
font_01_sfnt_off000132b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B3 10624 bytes
SHA-256: 26422f1320570fe26e58d56e0c4b372cba111e2e9728be1ccaf48144f4bc659d

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