Malicious PDF — malware analysis report

Static analysis result for SHA-256 5041df2127b7e2df…

MALICIOUS

PDF

74.8 KB Created: 2020-12-23 19:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1fbb30c378254392bb02cd0c17e4ed8 SHA-1: 7095cbadf8b426779ba02232237d19536f41f0ad SHA-256: 5041df2127b7e2dfb55e291d426b92b5e0a30ba67f99017c8839ea9cfcb7fb66
244 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a phishing or redirection lure. The presence of numerous external links, many hosted on disposable domains and some pointing to known malicious redirectors, suggests an attempt to drive traffic to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to its generation, but no direct instructions or content indicative of a specific scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=business+model+generation+canvas+pdf
    • https://cdn.sqhk.co/nivuduful/Nhfdgdo/pomunekodozofuxejevuli.pdf
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/veziwefaxodonazil.pdf
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/bebebixorur.pdf
    • https://lemagijazifar.weebly.com/uploads/1/3/2/7/132710763/3116875.pdf
    • https://nixuxani.weebly.com/uploads/1/3/4/4/134433038/xapujigirobuten.pdf
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fb740363d248.pdf
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/pumaluli_dulumuxogazapim_sobemufojo_nimepus.pdf
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/xamalamo.pdf
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fc95ec591dc7.pdf
    • https://cdn.sqhk.co/wukibezoso/dghiih6/divizipasajarajodusogodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40d22350-3b91-44bb-975a-4d2c97b830bc/dijijopigibomako.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e742.bin
50e567bd6ac569cdcd0d1dfa6bd5b265cf78de3ff3cbdbb949aca899e3d3aa15
pdf-font-stream PDF embedded font (sfnt) at offset 0xE742 5584 bytes
font_01_sfnt_off0000fa37.bin
0373a6b5cfd0b996927c5a956d95bb04423e1c212531f72bbe508d6d56194506
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 10884 bytes