Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d017fad12c81d89…

MALICIOUS

PDF

65.6 KB Created: 2020-11-14 18:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c352b419239a97fe9f73871c4d6d9b7f SHA-1: 33c6e8e21e01eaa1a9869d516c903ad5bd771911 SHA-256: 8d017fad12c81d8975c266714c94f83b3d87c39730d6e2e7c4de1118c1b0d85a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body text, though garbled, includes keywords suggesting a lure related to network device setup, aligning with the detected external URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=netgear+wn2500rp+setup+youtube PDF link annotation
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/1171660.pdfIn PDF document text
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/wudixonukofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f92fc4daabf9.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/e64b5d2bd3.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/xomafuzeb.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/a81ff34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f8c7114707dd.pdfIn PDF document text
    • https://fofosaja.weebly.com/uploads/1/3/4/2/134234592/gedim.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/f07c57ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tipakalif/bilupanidutoxemak.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/escalation_protocol_weapons_not_dropping.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/vewiwep.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39445730679.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_off0000c2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F5 5656 bytes
SHA-256: f601d64eb0cac11af4accbe719776b77f36460d337d54bd894d31e6b13d1183b
font_01_sfnt_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 10308 bytes
SHA-256: b21b0220afc9bd63b58dea8c74523c5312427c66ca2374ffbdaf0da4b0ac8318

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