Malicious PDF — malware analysis report

Static analysis result for SHA-256 336a958f89445a41…

MALICIOUS

PDF

62.0 KB Created: 2020-12-20 04:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 30d777e91cdf8b0fac8e2f1481770b73 SHA-1: 3d7bfb6010031fbc3de1a2a282208921a3985123 SHA-256: 336a958f89445a4119c59c5a0c1e10b52bbe99a96dcb6f604cf5a9c17735c9c0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=pdf+control+engineering'. ML classification and ClamAV also flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=pdf+control+engineering In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5f93a3cc4de14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f90167494d02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417531/normal_5fdda7731dc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fb2c3c902f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_5f9c9156a525f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5fadb9988469b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_5fac3247b4a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fae03fd76f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f8ab647408ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f8ea275c8d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f99736fc2b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8b9295a8283.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/5fc18357bda9c57a97c28a1b/t/5fc2f531cb3e0f5771b2178b/1606612275097/duforemot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853b0876-9b3a-4a5b-bf38-6c6869126807/jiguwezevazozemuxofivofed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac0721b-cb09-4eaa-989f-6a1a18be3e25/lujiretamonisiwalififo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a8f52bbd74065826fdfd/t/5fc988bdd7c3040d87285eac/1607043263422/insead_knowledge_twitter.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_off0000b9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AD 4804 bytes
SHA-256: 880fd6f8c3f5603365322e24f1b67889a49ee89581ce7f79cfab087afba1ee91
font_01_sfnt_off0000ca15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA15 9632 bytes
SHA-256: fdd674abeb696f208b294d03fded2cca214951c057433a85c3853c10ab3f1247

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