Malicious PDF — malware analysis report

Static analysis result for SHA-256 792feed894f30627…

MALICIOUS

PDF

72.7 KB Created: 2020-11-25 23:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f1f33e1e7347118dcb72cfcf5a25db84 SHA-1: 53d6396203dde9cfffd4c7fed34b505f5d81a2b6 SHA-256: 792feed894f30627947d48b1f3e2c6528fcec51630d4e6320783287067acf10a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam, as evidenced by the embedded URLs and the document's deceptive content.

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://trafftec.ru/strik?utm_term=gladiator+heroes+mod+apk+unlimited+gems PDF link annotation
    • https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/wabemubexuzezabuk.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f88d68c7834a.pdfIn PDF document text
    • https://petarukezatu.weebly.com/uploads/1/3/3/9/133997491/a7084b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5fb3d9be3185b.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/4133769.pdfIn PDF document text
    • https://deximuxinudob.weebly.com/uploads/1/3/0/7/130739142/097dd9c.pdfIn PDF document text
    • https://rawogozanukej.weebly.com/uploads/1/3/4/6/134623914/zaxuwilivoku.pdfIn PDF document text
    • https://taguraridefukal.weebly.com/uploads/1/3/4/4/134446716/tafekilowajepi.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/jedaxopopuko/77139660025.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/latest_update_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197f0c5a-2b2b-433e-a9e0-2f00004b444f/grammar_translation_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab05b557-d012-4b5c-83d5-92792a49cda6/oxygen_not_included_farm_station.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_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 5468 bytes
SHA-256: 7fbbe1e074766ac44bf451070d7033b895ab2d6b1cd49f227a8a8e68936702d6
font_01_sfnt_off0000f08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 11200 bytes
SHA-256: f65341ffc1ac0f058907787b9ab7d1d72833b261d23340f48cafb1907417c737

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