Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbe6cb3d9ef07eb…

MALICIOUS

PDF

72.4 KB Created: 2020-12-11 00:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08c8e5b1a08cf5c49dc3baa90e3c9625 SHA-1: 1190660b05c11abcf1f5e137e96fcabf36d8a464 SHA-256: 1bbe6cb3d9ef07ebf910f4befc79781fa061456a2972adb16f3b647fe2d3dbdf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a tactic to artificially inflate search engine rankings or distribute malicious links. The presence of ClamAV and ML heuristic firings, along with the malicious verdict, confirms its harmful nature. The primary IOC is the URL 'https://trafficel.ru/aws?utm_term=neha+pandey+busy+busy+song++bestwap', which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=neha+pandey+busy+busy+song++bestwap
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/2170930.pdf
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f965e054902d.pdf
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/kikozal.pdf
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/xupokegojazede_zifaxewos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc0e7b39d79364840ae79ed/1606477747594/belladonna_seeds_witchery.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a1e3c6ccf69f35496fa/1606371870654/kigopuvew.pdf
    • https://s3.amazonaws.com/buganabowumujef/black_panther_via_toxicwap.pdf
    • https://static1.squarespace.com/static/5fc7a36c02915d4a16f9a670/t/5fd1f724ad61ab58318e98c8/1607595813097/arduino_bluetooth_terminal_app.pdf
    • https://static1.squarespace.com/static/5fc5d1b33dfdd95b60f6dbde/t/5fcf9cda1b45e152edcf0c8a/1607441627210/36683735677.pdf
    • https://static1.squarespace.com/static/5fc1c42b085bf90c0e0336d5/t/5fc510529b1ed035387d351e/1606750292612/xapupapodarozatamizolo.pdf
    • https://s3.amazonaws.com/woberiz/vinanaxeg.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_off0000ddeb.bin
1e23fd2b65855ee3f4b0a020066f6c9da6946122313118d1d976af0fa62ccac8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 5396 bytes
font_01_sfnt_off0000f05d.bin
6ce9cb9a9e038d6eb840c10896e06b36fe711675ae554770532fb036bfeafb92
pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 10688 bytes