Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22f5b4db94a533b…

MALICIOUS

PDF

70.7 KB Created: 2021-06-10 19:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3a7facc9db6233a0d8cefb439488d39e SHA-1: 04f3c77555d3bd9842b67f893398f7e6997d71a0 SHA-256: f22f5b4db94a533b8cfe39c8e99e87f652ba6aaf84bc534e79148c7ee1e013ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The presence of a 'download' button lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=tubemate+apk+download+latest+version+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405641/normal_60506451bd22b.pdfIn PDF document text
    • https://lejezazunogi.weebly.com/uploads/1/3/4/5/134583087/4975814.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/gorabi.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/misexa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5fe1c2ed70961.pdfIn PDF document text
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/fujiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5fe1c400bbcf2.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/vugizamena-mifowos-tusugimatizer.pdfIn PDF document text
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/3501181.pdfIn PDF document text
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/vozuruguleniwebobel.pdfIn PDF document text
    • https://bumudipokipilu.weebly.com/uploads/1/3/4/3/134350227/fepananokaroxu.pdfIn PDF document text
    • https://dewokiwo.weebly.com/uploads/1/3/6/0/136028273/4852931.pdfIn PDF document text
    • https://pesilukijirizi.weebly.com/uploads/1/3/4/8/134864792/6287429.pdfIn PDF document text
    • https://denalozi.weebly.com/uploads/1/3/0/7/130776502/7428980.pdfIn PDF document text
    • https://nifusesoporiw.weebly.com/uploads/1/3/5/3/135309858/watulakoti.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/8214243.pdfIn PDF document text
    • https://welarozukakiwa.weebly.com/uploads/1/3/4/4/134497755/4541027.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/0ef1a6ec7.pdfIn PDF document text
    • https://jujoxetanilodav.weebly.com/uploads/1/3/5/3/135397559/4354810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_601f101131b16.pdfIn PDF document text
    • https://kemewekodu.weebly.com/uploads/1/3/1/8/131857474/6035041.pdfIn PDF document text
    • https://jenetekeze.weebly.com/uploads/1/3/4/7/134772573/wekekunizule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_605842b74932e.pdfIn PDF document text
    • https://gagafilesiruw.weebly.com/uploads/1/3/4/8/134886729/5009832.pdfIn PDF document text
    • https://damabinon.weebly.com/uploads/1/3/0/7/130738970/5920760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79B 5604 bytes
SHA-256: 2ed3974d5734729b76b240d10648e24a5fdd4459eb180d4873cf4b02805656fc
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10040 bytes
SHA-256: c00b7132b56e6861d6e2546c52d309ced0df4fd92cf570f8cc89afdefff5de8c

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