Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f125ad4b50ebcb1…

MALICIOUS

PDF

59.5 KB Authoring application: pdf-parser
MD5: 717b8f9bb98805a1687af07023746954 SHA-1: 2689a45cc3f12f515cc67c24b5a336f83091718c SHA-256: 0f125ad4b50ebcb1765a3adce7eedf119c9f77c79083d60ecfacf3e448840cb9
152 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting a critical heuristic for a PDF link farm. The document body, though partially corrupted, contains references to a study guide for a Microsoft certification, likely a lure. It embeds numerous URLs pointing to other PDF files, suggesting a multi-stage download or redirection scheme to deliver a payload. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic indicate a phishing or malware distribution attempt.

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://eldersemporium.com/uploads/1/3/0/6/130604740/gepowobasogeno-wepagomoted-gufejitata-xawex.pdf
    • http://willowwolffurnishings.com/uploads/1/3/0/6/130620890/573446.pdf
    • http://cjsheavyhaul.com/uploads/1/3/0/5/130540699/9007380.pdf
    • http://onboardxpress.com/uploads/1/3/0/5/130589444/wamevajafepil.pdf
    • http://ygardens.net/uploads/1/3/0/5/130539170/4317c87bc77bda0.pdf
    • http://dominiquehanover.com/uploads/1/3/0/2/130287221/rajutulevoribi.pdf
    • http://mimca-whistler.shop/uploads/1/3/0/4/130476130/2163181.pdf
    • http://chairact.com/uploads/1/3/0/2/130289613/ridilige-jazabifoduwev-wisuwarenip-rinakenewozepe.pdf
    • http://blondeysblog.com/uploads/1/3/0/5/130539440/zabunotog-wewedef-dovixasidivilob.pdf
    • http://ellabelleslime.com/uploads/1/3/0/6/130620416/7163193.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/3/130323145/130323145.html#mcsa+guide+to+networking+with+windows+server+2016
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013b1.bin
4a4f0a7ac04ebb28aad8491568f2e46dcea0c835f00e0989a574e25f26cac7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1 8680 bytes
font_01_sfnt_off0000a1be.bin
a88a3252a732d83265545c0d7bca880eac5c53956b7c2c19aa40bc62a0bd5b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BE 16492 bytes

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