Malicious PDF — malware analysis report

Static analysis result for SHA-256 512edce99200c0eb…

MALICIOUS

PDF

65.3 KB Created: 2020-12-06 16:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed42d16828e84ed0a4d8604cb2b15780 SHA-1: 7143c17f55e74ac55b55f8d5b802a2b41ea496f2 SHA-256: 512edce99200c0ebd31edcfa5f1caf9d0ac1ebd7cfeff3d1556622447b695381
230 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to link farms and redirector infrastructure, indicating a malicious intent to direct users to external sites. Heuristics indicate the presence of malicious redirector links and a general ML classification of maliciousness. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'Msn member center' and urgency, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?utm_term=msn+member+center
    • https://tosufiriro.weebly.com/uploads/1/3/4/4/134472590/pesijuv.pdf
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8800b9aeb9c.pdf
    • https://cdn-cms.f-static.net/uploads/4451742/normal_5fa273fcbfd8a.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f93cf94acdb1.pdf
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fcc47baab81c.pdf
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5fabc72d29057.pdf
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/5142058.pdf
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87eda8f1716.pdf
    • https://static.s123-cdn-static.com/uploads/4445104/normal_5fc4076344a37.pdf
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/podob_katuxijuretew.pdf
    • https://wenajatimox.weebly.com/uploads/1/3/4/4/134480159/114958.pdf
    • https://piteselijofer.weebly.com/uploads/1/3/4/6/134608400/muzagema.pdf
    • https://fuxobubexozemag.weebly.com/uploads/1/3/4/7/134752644/ravadotixovila-nugiruduk-fopanotus-pevelotiwiz.pdf
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/f2d135f3a52091.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000c486.bin
e1a797c39eac72e029004be67a4d43c55b6f9d17fff0ed581f03ec2ccf2c8ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC486 4848 bytes
font_01_sfnt_off0000d4f9.bin
36b37d2f4edc5adf38db1807ed29940f51e55e7d6f86158601b320e445b3819c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 10436 bytes

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