Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cf2387cd5c958d…

MALICIOUS

PDF

35.8 KB Authoring application: PDFBox
MD5: 21f03626cdf53c0699c3ddd8a0d28cb9 SHA-1: 649cce78a93858bc2976767ae19bd49a9010efcb SHA-256: 56cf2387cd5c958dc701c5bd4f2eb937799730833db5fff3e4b4bfb378e08631
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a link farm of 31 external PDF files, disguised as a guide for converting PDF to Word. This heuristic strongly suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports this, indicating it's designed to traffic malicious content or redirect users to phishing sites. The ML classifier also flagged it with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://oarkridgefarmsonline.com/uploads/1/3/0/4/130476732/vasapo.pdf
    • http://runforestrunclub.com/uploads/1/3/0/7/130775448/rajobitowogexeziba.pdf
    • http://lynklab.us/uploads/1/3/0/2/130289558/0912ef6.pdf
    • http://gw-76.mnemonix.com/uploads/1/3/0/7/130776025/66c188526.pdf
    • http://nanni.info/uploads/1/3/0/4/130483833/kejolejawuvavenemadu.pdf
    • http://monteschoenstatt.org/uploads/1/3/0/6/130621215/popaxepaves.pdf
    • http://madisondigital.net/uploads/1/3/0/6/130639474/nelijajowizu.pdf
    • http://dbtdelaware.com/uploads/1/3/0/4/130483980/6bb43ca2.pdf
    • http://sa-machine-learning.org/uploads/1/3/0/2/130289474/leluponedazabuzusa.pdf
    • http://www.aldrichmw.com/uploads/1/3/0/4/130435783/gosuzaxo_zunagadozekal.pdf
    • http://monarchrev.com/uploads/1/3/0/7/130739732/bodalefe.pdf
    • http://trevordewitt.info/uploads/1/3/0/2/130289754/521835.pdf
    • http://diamondviewfarms.com/uploads/1/3/0/6/130621219/7b057c1b5e19af6.pdf
    • http://ngssmichigan.com/uploads/1/3/0/6/130620267/simasepovafoxup.pdf
    • http://greengopropertysolutions.com/uploads/1/3/0/3/130323146/silifujizidiba_kozamofino_wajomutatizopa_kubefutibodu.pdf
    • http://coordinator.co/uploads/1/3/0/2/130288329/bd3f1a.pdf
    • http://thedogbedcompany.net/uploads/1/3/0/6/130603943/130603943.html#how+to+convert+pdf+file+to+word+document+to+edit
    • http://sa-machine-learning.org/uploads/1/3/0/2/130289474/leluponedaz

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003044.bin
2dc8f74a5e4512aba369fbf91f1800fb4f87bc96dd72261f039900a8eef06fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 7840 bytes

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