Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f6251b827f8dc1…

MALICIOUS

PDF

30.3 KB Authoring application: PDF Studio
MD5: d06b7bfe99c3d72aff2beebf9016b8ac SHA-1: c110ab179210279b2d46c14f35147931ac60a22d SHA-256: 73f6251b827f8dc16dddc34a40fc5bba20156f6b1ca1c2a3ef08b4b266ee5f70
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the presence of numerous URLs suggests a potential for downloading further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://icrm2019.org/uploads/1/3/0/6/130604844/9bd37b.pdf
    • http://ilovefatjacks.club/uploads/1/3/0/7/130776168/darusuvogu-texosajujul.pdf
    • http://www.etruckbizforfxg.com/uploads/1/3/0/3/130313038/woluzedat-biwewaturufusu-gejijajigevo-fifosaxogutiv.pdf
    • http://manofaran.net/uploads/1/3/0/6/130620524/solimebovojedop.pdf
    • http://www.kheventsonline.com/uploads/1/3/0/8/130874019/rewesup-rimilokemukura.pdf
    • http://www.bigwoodshc.com/uploads/1/3/0/8/130814021/ce8d957f12db8.pdf
    • http://fsq.me/uploads/1/3/0/5/130588363/larazevana-nuwikoru.pdf
    • http://acloudsolutionsarchitect.com/uploads/1/3/0/2/130288757/10fe25.pdf
    • http://ronnieskowron.com/uploads/1/3/0/4/130475966/c5c49a4f856db9d.pdf
    • http://beyondthebellharrisonburg.com/uploads/1/3/0/4/130488228/pogeliwijuxabovuvix.pdf
    • http://sandyvaileauthor.com/uploads/1/3/0/6/130639899/3687252.pdf
    • http://kimblynehenrydesigns.com/uploads/1/3/0/7/130738903/mijiwovalavibi.pdf
    • http://host31.carmichaelnl.com/uploads/1/3/0/5/130539885/130539885.html#html+tags+and+uses+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001f89.bin
25938125e12479ae9ce7b48b2d7fa4c7b049a9b2350c8750393cc9c23b7f5dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F89 7384 bytes

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