Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aba1075f6c65db3…

MALICIOUS

PDF

74.9 KB Created: 2021-06-01 22:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7973138bfd01a2deaf6629a188576f60 SHA-1: a5160c37457648bed3b84947805b45824cc41b2a SHA-256: 6aba1075f6c65db3aac4cdf2943514ca6cdd25e1afb5f29ac997bc46116e449b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/pbw?utm_term=lowrance+hook2+4x+owners+manual PDF link annotation
    • https://jigejoxipivigif.weebly.com/uploads/1/3/4/7/134731155/muxazasakena-tidefeluwaz-fawagalove-wegibazozeleri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_600979df4a79f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448984/normal_60b35e923b3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_6029f66fc9346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_6024131739a10.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/926271.pdfIn PDF document text
    • https://nopufara.weebly.com/uploads/1/3/3/9/133999240/zujulida_napuw_padezufiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_606a8bba183a4.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/fonifugulaxumov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_602ee403a04e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_603be6236e687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5fd878f726928.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokopaviwu.pbworks.com/f/data_abstraction__problem_solving_with_c_walls_and_mirrors_7th_edition.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144420576/toddler_cape_coat_pattern.pdfIn PDF document text
    • http://naxenuve.pbworks.com/f/my_stupid_boss_2_lk21_indoxxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbabec0-8386-48d1-bd0d-c2f8ff29ef8b/klein_tools_ncvt-2p.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144444927/83526516182.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/xirefipef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c949e21-0dab-4a9a-a5a0-c00d064732eb/what_was_the_most_severe_thunderstorm.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144424155/71103469662.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/w/file/fetch/144422346/google_dialer_mod_apk.pdfIn PDF document text
    • http://kolelulu.pbworks.com/f/77350374851.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/seginadodimagokigame.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/f/what_happens_when_the_krispy_kreme_light_is_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cff24b4-8b6e-41bb-a929-f33d30509b7b/20021520905.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_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 5424 bytes
SHA-256: 84c0fde7fd9f03db34f50028e96a687cb2c5a7c3965d5f2787488cb4c861e93d
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 10424 bytes
SHA-256: 86ce35881a3f863bb0447ce91ecd15b9d4e4fe0cc4d72a97f82cffed84e32896

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