Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7a8d53fd410319…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 12:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: be0b8f846ebd2334e155ff90e6884793 SHA-1: 242eb9926c3b87a35cafd8b779208d0dcbc8a606 SHA-256: 0b7a8d53fd4103199eab5f883a132200244ada1e222cf930401caa23d711a933
186 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 0.9996

Heuristics 6

  • 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.
  • 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://golowaki.ru/wix?keyword=minor+calyx+model PDF link annotation
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/midodoge.pdfIn PDF document text
    • http://fezibinuzot.iblogger.org/33681326960.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/zhdw2ib/photography_hashtags_for_instagram_likes_and_followers.pdfIn PDF document text
    • http://helpverifybadges.com/39645762404c1guw.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/fiwexozuxisusekeg.pdfIn PDF document text
    • http://youtube-subscribes.com/32575963127xc2vo.pdfIn PDF document text
    • http://govnosiakxws.online/64107666444xx8zp.pdfIn PDF document text
    • https://tuvonozesafuk.weebly.com/uploads/1/3/4/6/134600303/deruloraj_pobugewaripab_temaliven.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/icgedhi/anonytun_mod_vpn.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/7090588.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/MfihGgj/6442554473.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/gebalozagulobuxepe.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/tjiphht/green_party_california_2020_endorsements.pdfIn PDF document text
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/b3ee8.pdfIn PDF document text
    • http://hayatevesigar.online/9439985303natta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_da7336d223dc4cc49060ef74abcff12b.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_508d67fda46244debe728439e0a5179c.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_13ceb49c9266449091c9a8cbdf128523.pdf?index=trueIn PDF document text
    • http://tagugatukosag.epizy.com/ableton_live_9_manual_rus.pdfIn PDF document text
    • http://jifexal.epizy.com/xilusalosevebi.pdfIn PDF document text
    • http://murarefap.epizy.com/amplifier_circuit.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_e71d3fcb815b4363ab7ca1eea5cfe065.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 5084 bytes
SHA-256: c60001070db6275d4243c0803ae40323bf2db389f864bfa1753404f219a7c4fa
font_01_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 10792 bytes
SHA-256: 41c29ed47c3eb2bdec4a495f11604563139a23ed4ddfe4ade860f0726967aa6b

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