Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f2a22283bf9b5b…

MALICIOUS

PDF

84.6 KB Created: 2020-12-06 10:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 589631417f6b8db7e5af746cb145dd6c SHA-1: 7f19bcecfafb275f3befdc87c2d4134ecde75c3b SHA-256: 81f2a22283bf9b5b09a93ab339906aa42222b5afc4fffb26b37cb0e28b078ddf
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of phishing or malware distribution. The embedded document body text, though heavily obfuscated, contains fragments suggesting a pretext of urgency or importance related to a meeting. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/123?utm_term=your+boss+is+extremely+busy+in+a+meeting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f9747953dce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f910d10809cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f9c9b0632994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fcbd92187b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fbef91eec246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1841dbd14ff0dd2a1095f/t/5fcc43479aa2de0c648702b8/1607222088661/23700454327.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6981173fb5383b9ab41c/1606379906014/doraemon_movies_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/81234278863.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c991c6d9645836219624/t/5fc14bae64571256546b8fb7/1606503342570/80300867752.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa60e6d49a06bb5714bb/1606285921388/rupukol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c001df132613bbbcfd0a/t/5fc4aea13570fb44d1971c3d/1606725282131/fowijowuwiminazagasabujiw.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_off00010fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 5276 bytes
SHA-256: aaf67e88ca7868d0d98f94d8636e1033714b5d766f0395b6a50ca17601e8779e
font_01_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 10692 bytes
SHA-256: 402bbd83f2e8db95798b85943832445e1e097ff21e25a84d651fe7e68e30312f

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