Malicious PDF — malware analysis report

Static analysis result for SHA-256 e485e276ebc970e2…

MALICIOUS

PDF

70.7 KB Created: 2020-11-19 03:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7e7b8be3d77c598bcdf76a6800761d63 SHA-1: df57a4824ebddbb4e703dcad53c6d5e575eeca74 SHA-256: e485e276ebc970e2a5db51f56c6e341690031b052846d19ec8d7d3c70ca647fb
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document is classified as malicious due to its inclusion of a link farm and a redirector to a known malicious URL. The document body, though heavily obfuscated, contains references to 'Dibbuk box hoax' and metadata indicating it was generated by wkhtmltopdf, suggesting a phishing or scam lure. The presence of numerous embedded links, many pointing to disposable hosting or potentially malicious redirectors, indicates an attempt to drive traffic to malicious sites.

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://cctraff.ru/strik?utm_term=dibbuk+box+hoax In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87b129d2dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f915b1b4a871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5faf14ecce947.pdfIn PDF document text
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/zivefukazaxevususa.pdfIn PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/fanaf-botidejifa-zimusedijim.pdfIn PDF document text
    • https://renikafajuwigag.weebly.com/uploads/1/3/4/3/134317319/c839e54d.pdfIn PDF document text
    • https://zesawomu.weebly.com/uploads/1/3/4/3/134321331/vadazikofuf-luvesukokip-vumuxomudubo-bumugilut.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/lunimeno-wizugenef-luxalelinawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f899f80edb3f.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/fasanag/45515724151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6a0145-9085-4aa8-b460-3e82f268684d/87530493647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2862e48-54b4-40ed-b628-b0895116f506/36274950345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18dc31ac-25b2-4946-948a-84d8ff0b32d9/84494827705.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_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 4736 bytes
SHA-256: ab46796d9b71dfd2a9dbbc58698bd67e77366c65a98ad4a9c46bae0704b8207a
font_01_sfnt_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 11156 bytes
SHA-256: 84db2b8238407ed0d3bd3189636c23fef1b92ce08c2edced676c87280d26dde3

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