Malicious PDF — malware analysis report

Static analysis result for SHA-256 469d1bb21c20780d…

MALICIOUS

PDF

61.1 KB Created: 2021-01-15 13:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c0e266554fc7acce0532d257d16b2132 SHA-1: 7a2aa0d21e7556738e2fabb4bfdafb1186166cfc SHA-256: 469d1bb21c20780db2d2f3fa7ef7ec69aec3e2fa9d27f06ed4e99b153f4ea043
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to manipulate search results or redirect users. It contains numerous embedded links to external PDF files hosted on disposable domains, with one link pointing to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and ClamAV detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/aws?utm_term=b2902a+programming+guide In PDF document text
    • https://cdn.sqhk.co/xawenano/ribb0gg/karugiserudokaf.pdfIn PDF document text
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/xurig-jejatusamubez.pdfIn PDF document text
    • https://gemirolav.weebly.com/uploads/1/3/1/6/131606407/282f5437878.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/9488914.pdfIn PDF document text
    • https://site-1174761.mozfiles.com/files/1174761/this_war_of_mine_wiki_supermarket.pdfIn PDF document text
    • https://site-1216774.mozfiles.com/files/1216774/msi_afterburner_screen_recorder.pdfIn PDF document text
    • https://jenodavosu.weebly.com/uploads/1/3/0/7/130775827/lakaxeropo.pdfIn PDF document text
    • https://lekusimije.weebly.com/uploads/1/3/1/3/131383821/digopesoxavug.pdfIn PDF document text
    • https://lokedidige.weebly.com/uploads/1/3/4/3/134315074/wigiwuvawateni.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/8825940.pdfIn PDF document text
    • https://pivamuwonojazop.weebly.com/uploads/1/3/0/9/130969183/wadazanifatinej.pdfIn PDF document text
    • https://site-1178549.mozfiles.com/files/1178549/gefulerixiwixaxulipo.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/pexodugosa/33440023095.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_off0000b487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB487 5548 bytes
SHA-256: d5d24afa5596ca49a708a063231b43690e63f0825c4024aca7875ffe2cf8b664
font_01_sfnt_off0000c753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC753 9596 bytes
SHA-256: c1ef154d5f29b237433a6df3f27427a8ea1beda98d60c0f0778e7b670736670d

Open this report in the interactive analyzer, or submit your own file for analysis.