Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdd817727665e81…

MALICIOUS

PDF

88.7 KB Created: 2021-03-12 20:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bbaa338b29189ea8fd206a9ac27fe9a1 SHA-1: be53ff3870b9c93e3bbb818039044a71a3b63a78 SHA-256: efdd817727665e811111192ce0ad8c5e404b1dec1f26b2d48d536e3882151a89
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=treatment+of+resistant+hypertension+pdf PDF link annotation
    • https://cdn.sqhk.co/taxosavasesa/ifid8hc/83103991248.pdfIn PDF document text
    • http://ryukzak.digital/patewufudisumin2cq6.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/powefukaxaka.pdfIn PDF document text
    • http://azalea.store/in_christ_alone_chords_lauren_daiglewjr9g.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/jtAfBih/abandoned_jurassic_world_fallen_kingdom_for_mcpe.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/38360881052.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/63347122128.pdfIn PDF document text
    • https://kubojetezeb.weebly.com/uploads/1/3/4/5/134586336/bokidaxo_zalafekafez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://madigekole.onlinewebshop.net/cirque_du_freak_books_ranked.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/free_templates_for_golden_wedding_invitations.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/sabibebudo.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/karakteristik_ajaran_islam.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/florida_vehicle_bill_of_sale_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/free_printable_sight_words_worksheets_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/74719198070.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

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_off00012012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12012 5300 bytes
SHA-256: 5eebfb21abdb4339d7cb145334dd78009fb51f3241f91a70cd22ae34f4ab86cb
font_01_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 10512 bytes
SHA-256: fd0d61093449b2fb8c1d36d653edcd2e2eeaedaeb729fcdf32163ab59f1a5e44

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