Malicious PDF — malware analysis report

Static analysis result for SHA-256 86965b415a6b3928…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 12:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3775618b5fc5ab433e1962d50be07d85 SHA-1: 8766826b22bb6c3b048eae271c3b9558bff38ee7 SHA-256: 86965b415a6b3928a73df93c0e37ed9784bb46c1724339c1610dfa702336ebcd
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 0.9997

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 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://bologen.ru/strik?utm_term=how+not+to+fall+in+love+with+a+jerk+book PDF link annotation
    • http://interbank.link/hl_ahuja_advanced_economic_theory_microeconomicsqn7no.pdfIn PDF document text
    • http://shop-kid-toys.online/srimad_bhagavata_puranaz8to4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479441/normal_6009796806ff8.pdfIn PDF document text
    • http://potolkilife.ru/chrysler_sebring_2006_repair_manualwwv2u.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/qghSgf4/wogaratomuno.pdfIn PDF document text
    • http://nalapagized.22web.org/the_promise_of_a_pencil_adam_braun.pdfIn PDF document text
    • http://liketsven.xyz/7511901251t8f2m.pdfIn PDF document text
    • http://teksol.xyz/hora_santa_apostolado_da_orao9wklr.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/iebMwjc/ion_house_party_speaker_with_lights.pdfIn PDF document text
    • http://jnatural.space/how_to_work_a_receptionist_phone6lqo2.pdfIn PDF document text
    • http://hrushch.space/dokowurors4x5j.pdfIn PDF document text
    • https://cdn.sqhk.co/simubekoz/ghcdage/31726686350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_60087bda4ea69.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/YhiojiD/86804970837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepisaf.epizy.com/wizidoru.pdfIn PDF document text
    • http://xunaruxu.rf.gd/21852755055.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/anxiety_definition_psychology.pdfIn PDF document text
    • http://susegemosesipul.epizy.com/how_much_do_hvac_technicians_make.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/indian_accounting_standards_list_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/78943340170.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_off0000e5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EB 5072 bytes
SHA-256: 9f9ebe5ce027296a5af26c05b5abe6db6770535c0dedf5fbea9e8669339a37d5
font_01_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 11184 bytes
SHA-256: bb0fd23fc18e585a476ef5976cbd7002065102982ec7dd85388474c9eef319f4

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