Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92b3ee5f0f177e1…

MALICIOUS

PDF

66.8 KB Created: 2020-12-02 22:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 93f5c55955de00316e22f1f733511fdc SHA-1: eb77e2840e5bc0f425a87fc1442ec8d79d9dedb5 SHA-256: f92b3ee5f0f177e1e1ce30e5cec4ba4ac25e1d70126a0c4b821e0cca6c032ec2
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary function appears to be directing users to external sites, potentially for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://traffking.ru/strik?utm_term=sportster+forward+controls+install In PDF document text
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/7590564.pdfIn PDF document text
    • https://xawazexeresav.weebly.com/uploads/1/3/4/5/134527443/680c810841a1d5a.pdfIn PDF document text
    • https://wofalexo.weebly.com/uploads/1/3/4/6/134697980/xutimitisefofubep.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/logape.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://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc15c4f9d79364840c0545b/1606507599980/18219318098.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/korean_bbq_taegukgi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb4affc-da7e-45fd-91c4-022fdfe57ace/tovixofanaxev.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/northside_high_school_fort_smith_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c3e9d6-8d12-4d81-a85c-500a76243d4c/lipibixamoruzezupek.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_off0000be26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE26 5132 bytes
SHA-256: aa2d4ff3632585ada6a1ed1e4120331895120070db0d5a409b825d0a6b94064b
font_01_sfnt_off0000cfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAD 9596 bytes
SHA-256: 40e0c7297e93b93b2db14ce97c0acdf62b5da7d5aaa088d100dd174515991715
font_02_sfnt_off0000f081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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