Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89910ee2a8a140a…

MALICIOUS

PDF

81.1 KB Created: 2021-05-11 05:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f0a4d7ecb98fe554ebde56e684a00b6a SHA-1: 16fe7d7c0946442f168214abec9a9769707d4db8 SHA-256: b89910ee2a8a140a1b5322ec1546707d4207803b3cbedf6bc112b760cb64fa12
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 0.9997

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://seumenha.ru/strik?utm_term=polk+magnifi+mini+program+remote PDF link annotation
    • http://superheatbelt.xyz/19237540552g6n8q.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/jevapege.pdfIn PDF document text
    • http://vipmanmarket.space/nelujexixanqtkfp.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/birose-kaponuditivena.pdfIn PDF document text
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/vosipotadira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68218c01-fe3b-44b1-ba49-23d245745d66/tresca_vs_von_mises_stress.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/36038538716.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/robbery_bob_2_double_trouble_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ea33ac-be36-4c70-b2e3-a62e48bda79c/pioneer_sc-9540_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02039993-0cf1-4c66-8cd0-ee385baa27d6/peg_perego_john_deere_gator_xuv_midnight_black_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/gisajotevisapabawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafc0b65-ee5c-47f6-94f5-2f9528c297c5/gikaxutezaruwijesixenej.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/rodetatakakalalajasetepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6122df1b-95a2-49f9-8d4f-43e2e81b5b68/jesus_message_in_telugu_share_chat.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/99463566954.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/31660494722.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/phrases_and_clauses_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/651572671.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/kerboodle_answers_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/vapimikinuz.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/why_wont_my_ihome_portable_charger_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/45398306846.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_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 5108 bytes
SHA-256: d554910aa63005b6bfaba4b3a6a8b8a894081da6937f46f0bd7f8838ff5c1698
font_01_sfnt_off00010add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 14684 bytes
SHA-256: 8f55a468f98c0784fa09331ef49ceb0132ba14a5cb3e83f5d1aed3cf8d2aaaf7

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