Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5432b913d6ed45…

MALICIOUS

PDF

88.1 KB Created: 2021-06-07 00:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 597a08aa7efa2ccb9d82d42e8452bfb8 SHA-1: 5178cd411a1b3b4ec767d12213339b2a135a8902 SHA-256: 2e5432b913d6ed456c0f23e22ddcef729351347991a55c746e6f5a6f1ceb3080
186 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of an external URI pointing to 'botokaw.ru' with a 'live football apps' UTM term indicates a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=live+football+apps+for+android PDF link annotation
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/1911044.pdfIn PDF document text
    • https://dukitupa.weebly.com/uploads/1/3/4/3/134393571/zofabub.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/371abce538bcc.pdfIn PDF document text
    • https://pezasagizagifoj.weebly.com/uploads/1/3/5/9/135968908/9430283.pdfIn PDF document text
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/jolagiwisivuzige.pdfIn PDF document text
    • https://dutariviwasupor.weebly.com/uploads/1/3/4/6/134610277/d286cff0615.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/6163563.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/pedavafe.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/tonenemax.pdfIn PDF document text
    • https://revekabidumuki.weebly.com/uploads/1/3/2/7/132710675/96c5b0dd81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_602a8b254b68d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4447271/normal_60b5090f7b48d.pdfIn PDF document text
    • https://beredixe.weebly.com/uploads/1/3/4/7/134762790/ec054850c2.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/d7f359d2-2d8b-4320-9aab-5a0ce62a63bc/what_is_a_adjective_example.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/how_to_find_total_variable_manufacturing_cost.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/case_580_backhoe_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e349741-7218-495d-ba76-4513f5ebd1e9/jevumopodiwufadusolerip.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144498546/jodobijomizetajada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991976b1-3dd5-48b2-8fba-25b8283f7da3/24768937987.pdfIn PDF document text
    • http://naxenuve.pbworks.com/w/file/fetch/144447921/can_a_centipede_bite_kill_your_small_dog.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_off00010f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 4964 bytes
SHA-256: bdc8ecf5aed92a3afb9acb17e0fa91b394a68d27ba04fc406aa7b5151a7b7ef1
font_01_sfnt_off00011ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFE 10872 bytes
SHA-256: baa4e957cfa931b304ff289d9bd364f92518796124c40f0fd4e08d5f5547b125
font_02_sfnt_off00014529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14529 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f