Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc398fbe04082c6…

MALICIOUS

PDF

79.7 KB Created: 2020-12-24 17:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fde3701521b039fc020afcd5fde5f61e SHA-1: 2304f5c922a5aa994dffd58e2da29e1073db08c8 SHA-256: 4fc398fbe04082c63f0d8f42fc93bc6c5a49256e566a2d382c1b1ca020e701fb
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits malicious characteristics, including links to known malicious redirector infrastructure and a high ML classifier score. The document body, though partially corrupted, suggests a lure related to 'Orange money transfer africa', aligning with the 'SE_INVOICE_LURE' heuristic. The primary attack vector appears to be directing users to malicious URLs, likely to facilitate further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=orange+money+transfer+africa In PDF document text
    • https://cdn.sqhk.co/zibusisujij/jhhaaXN/cosmic_kids_yoga_pokemon.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/tazaji.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/5064947.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/f243f871c841250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408464/normal_5fdd251552d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375522/normal_5fe15cd959eff.pdfIn PDF document text
    • https://cdn.sqhk.co/zipuzedozame/j9s2jb2/20860644528.pdfIn PDF document text
    • https://vukisopir.weebly.com/uploads/1/3/0/7/130776420/lobirineninijop.pdfIn PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/774905.pdfIn PDF document text
    • https://lisoletabe.weebly.com/uploads/1/3/4/5/134511207/joxesoporitemi-ranibomif-muteratijiwive-tamofivagetiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_5fbc86f8bcc57.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/19fba091-8315-4ce8-a08b-a28bc8186810/20315292876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe632261-0979-4fb2-812c-16070a44cefe/snake_plant_propagation_time_lapse.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_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 5300 bytes
SHA-256: 4cf8e440f41fbeecd9832bf87f3c214395875df92bf5c4a0375ef782f52d2f6d
font_01_sfnt_off00010e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7E 10524 bytes
SHA-256: 79a64466b3329d0f97afa9f301666bcad0eddccd8225f87f620e401a54b0ec35

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