Malicious PDF — malware analysis report

Static analysis result for SHA-256 8293ad53ba51dd07…

MALICIOUS

PDF

101.0 KB Created: 2020-11-18 15:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7e18e19abdf3e18b393cd76db3ff3836 SHA-1: 7d307a0472933d54314f6e352671fe8a73b49103 SHA-256: 8293ad53ba51dd07dbee15de1974cd6e4da9c67a6ba54b7f5bde37fae1cbfa79
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting services, indicating a likely attempt to lure users to malicious websites. The primary attack pattern involves a link farm designed to distribute traffic to potentially harmful destinations.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=dls+18+real+madrid+profile.+dat In PDF document text
    • https://misevitazivizux.weebly.com/uploads/1/3/4/3/134376704/neketovunize-vujenuxafuvat-kepofedivozofen-xagizulasera.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/jumosaw.pdfIn PDF document text
    • https://mulelene.weebly.com/uploads/1/3/4/4/134440938/1816624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f8f291cbf238.pdfIn PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/2900836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f8abbdb1b4fb.pdfIn PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/papononubuka-ponol-rijimijibufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5faa30857fa96.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/tanufiminexovo_xijaju_sididubupupuwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f726de9-7a54-44a0-9b36-5e32aad916c1/kezapujilufepipufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c34e1ea-a481-4d35-97fd-6293a057f25f/79079087326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc05105-8803-47af-a641-47f28afa70f7/nenobobeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e77540-0671-4685-8d03-7759d3c25746/4435271699.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_off00015124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15124 5464 bytes
SHA-256: 855be161416766f0da456f8e295965956d26df1074b89e4f2766bdfdb76ea4dc
font_01_sfnt_off000163af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AF 10392 bytes
SHA-256: 58ef5c104293c10e34874863425c2282648837e0988b7d4d4e3d606219e6531a

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