Malicious PDF — malware analysis report

Static analysis result for SHA-256 270ca7d5fc511122…

MALICIOUS

PDF

93.7 KB Created: 2021-03-31 02:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f86918a0c8a0a55ca83b1edd92480016 SHA-1: 040a74371056167d1b7086de9fd14bdecdc0f088 SHA-256: 270ca7d5fc51112226630baf82d6317efc2140231918986340ff41658809655f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or SEO manipulation scheme. The primary URL points to a workout plan, likely a lure to encourage users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=bulk+up+workout+plan+pdf PDF link annotation
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/fa224966b.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/tuwivosekatuzawebolo.pdfIn PDF document text
    • http://xujadawowupu.scienceontheweb.net/4549540316.pdfIn PDF document text
    • https://revawowi.weebly.com/uploads/1/3/5/3/135317167/7340130.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/absli_secure_plus_plan_brochure.pdfIn PDF document text
    • https://rufevefiwavanu.weebly.com/uploads/1/3/5/9/135992343/94e8acb343f613.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/2158006.pdfIn PDF document text
    • http://guronid.mygamesonline.org/26705995608.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/oleo_de_borragem.pdfIn PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/3a35a79a71b3e7f.pdfIn PDF document text
    • http://xaraxag.mypressonline.com/ragenexu.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/gikebisuvimoju.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/MVmmaie/48507132992.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/gomowurufitelib-fujatalevus-pobaduxututa.pdfIn PDF document text
    • http://xujadawowupu.scienceontheweb.net/hegemonic_power.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/hMhihid/52798417716.pdfIn PDF document text
    • https://fububekamuko.weebly.com/uploads/1/3/3/9/133986391/jopekelu.pdfIn PDF document text
    • http://salimom.mygamesonline.org/94944925356.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/572e2571-341f-4bf2-a86c-9bfcb303a2ae/obd2_cant_connect_to_ecu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f72e4e-7af6-485a-920b-d459bbf19fa4/45674177074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965237e3-d476-46a0-8897-684c22d95650/kiwidazisizidedap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744a8717-f001-4e2d-90e9-0d86663d254e/nerudigenorezenibavebuzev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F1 4776 bytes
SHA-256: 6e5c2dabc2d2b884cae5b5f14e2bada289ec84adf9569133a5efbf9ea4ceefdb
font_01_sfnt_off00013445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13445 11428 bytes
SHA-256: d88c860265833596918967657a93c8a969c4edebafcfbbeaeb853cedfaf11af6
font_02_sfnt_off00015b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3