Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f98c7ffaef54d4…

MALICIOUS

PDF

43.9 KB Authoring application: Poppler-utils
MD5: 99597f197812c6cdc3ba65259b493e68 SHA-1: 4f0353e15a04cb5a7300711fddb42c61d51520c4 SHA-256: b1f98c7ffaef54d4d86e3b10a23603a77fe473781af78c015c20589ee934a240
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links, with the first being https://zarapugu.weebly.com/uploads/1/3/0/2/130289222/0299c9be.pdf. The document body, though partially corrupted, contains text related to 'How to treat achilles tendon ache', suggesting a lure to draw users into clicking the embedded links.

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 https://zarapugu.weebly.com/uploads/1/3/0/2/130289222/0299c9be.pdf
    • http://wrinkleddogs.com/uploads/1/3/0/6/130621630/baxebejezanowo.pdf
    • http://rawhidemotel.com/uploads/1/3/0/4/130436173/simexekomekaz.pdf
    • http://miamicustomtours.com/uploads/1/3/0/5/130538842/4004464.pdf
    • http://tantramassagenewzealand.com/uploads/1/3/0/6/130603832/c74306a8026.pdf
    • http://assric.org/uploads/1/3/0/4/130483867/0cd334003a49c5.pdf
    • http://mercyscleaningservices.com/uploads/1/3/0/7/130739052/3924381.pdf
    • http://myentouragemusic.com/uploads/1/3/0/7/130739233/130739233.html#how+to+treat+achilles+tendon+ache

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001120.bin
6ded85b0658ffbf5e39327ea08d5563c539e7095daef00332cd6326b90d445d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1120 7860 bytes
font_01_sfnt_off00006491.bin
b195ba776360337e0c8847a1f70ebf7e776628c0b6b62df72d82cae76b96cbf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 16248 bytes

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