Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cdb459a920dec4…

MALICIOUS

PDF

35.4 KB Authoring application: PDFedit
MD5: eaf858f9fe8ba6f310550a80d2f6bceb SHA-1: 9ea997a22951e045d150655844d3ed6cf499b7fb SHA-256: 69cdb459a920dec4d25ed50f662c021aafd8179612c70bf16010d6ca073bc62e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or to distribute a large volume of content, potentially malicious. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing or malware.

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://immediateinsight.net/uploads/1/3/0/6/130621119/7673319.pdf
    • http://neurotherapycenterva.com/uploads/1/3/0/2/130289793/sozokopebubuzu.pdf
    • http://bradleypwright.com/uploads/1/3/0/2/130289209/zumakezefowixuza.pdf
    • http://bellathevagablond.com/uploads/1/3/0/3/130313176/terafisil.pdf
    • http://cairnsclassictours.com/uploads/1/3/0/5/130588701/timifif.pdf
    • http://mrssiegelsecondgrade.com/uploads/1/3/0/3/130379232/5b0be6d366.pdf
    • http://pruritusresearch.net/uploads/1/3/0/6/130605289/7207830.pdf
    • http://rochecenter.org/uploads/1/3/0/4/130483125/130483125.html#rocket+queen+guns+roses+lyrics

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000115f.bin
232ac263a3a5adc654e74ca86c6e3bad3246079ed6913488a5b096d54acdeb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F 8508 bytes

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