Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6c7fa3648d6ad4…

MALICIOUS

PDF

75.5 KB Created: 2021-06-05 17:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b6f15f6ac589c263b837f1cf39b61006 SHA-1: 527a95210a36f0c4f438bdc5cd2bf26c2e311f6b SHA-256: ab6c7fa3648d6ad406e8606fb03c028b95d11c3ebba28757e6fef1008ab50557
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a sophisticated attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/pbw?utm_term=what+game+modes+are+in+battlefront+2 PDF link annotation
    • https://xugirudubup.weebly.com/uploads/1/3/4/3/134332480/lodejijab.pdfIn PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/831d34bf3.pdfIn PDF document text
    • https://neruzokari.weebly.com/uploads/1/3/1/1/131164447/592196.pdfIn PDF document text
    • https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/3555994.pdfIn PDF document text
    • https://finonofegikagaf.weebly.com/uploads/1/3/4/0/134041572/vulebiwe_wezipodofu_rumevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wudiwiligis.pbworks.com/f/dowozulewasebumozo.pdfIn PDF document text
    • http://juwelite.pbworks.com/f/rozaragef.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/f/41091051311.pdfIn PDF document text
    • http://kizisoj.pbworks.com/f/32237271995.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/tasomoxetisusikunijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b6ded6-1211-4a6b-87e6-8519f108f44e/wasovasowevofakogebiso.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144609678/xowukawosolemiguletet.pdfIn PDF document text
    • http://nafidob.pbworks.com/f/povegikabujogokemaze.pdfIn PDF document text
    • http://gutopevif.pbworks.com/w/file/fetch/144577086/free_robux_no_verification_or_survey_or_download.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/f/33617698213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91189b8-d7c8-427d-981d-ce455e9ced8d/74139297423.pdfIn PDF document text
    • http://mamejoniza.pbworks.com/w/file/fetch/144658173/81101418846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c35844-1c9b-4451-be58-dc4dbb97f27c/putuduxadebiwikuvaw.pdfIn PDF document text
    • http://pitavumiza.pbworks.com/w/file/fetch/144637035/devepipozasoruxugivow.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/f/iosgods_call_of_duty_mobile_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71703813-038e-4631-8fde-ad38c45ec6f9/all_the_things_you_are_lead_sheet_bb.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/how_to_get_free_spins_on_bejeweled_blitz.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_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 5604 bytes
SHA-256: 3d8d181584ed30985337c59e12f9edd01aeda7de11f40cd55ca2a6ac6a5680e5
font_01_sfnt_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 10888 bytes
SHA-256: f4c1a681c67d9ad2908ef415e7f83a878ad620b8615cbb1d0d8307ed3bb87ca4

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