Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b08742ace61e8…

MALICIOUS

PDF

33.0 KB Authoring application: QPDF
MD5: e55022e9f1d9aaedf9da5c2a45fed5d6 SHA-1: e360d7971c186587b3d07967451200a81a2eb32b SHA-256: 553b08742ace61e85701c82e70bdd7dd4641c457c4b4377bf651e29b714f0fcd
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The critical PDF_SEO_LINK_FARM heuristic identified a large number of external links, with the first being http://propertymanagerfinder.com/uploads/1/3/0/3/130324011/2376740.pdf. This suggests the document's primary purpose is to act as a lure, redirecting users to potentially harmful sites. No scripts were extracted from this sample.

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://propertymanagerfinder.com/uploads/1/3/0/3/130323341/2376740.pdf
    • http://www.mail.cv-usa.com/uploads/1/3/0/7/130775084/lozaton-zirapugowubav-narojed.pdf
    • http://periwinkleandpoppiesllc.com/uploads/1/3/0/6/130603983/b2d9ce66.pdf
    • http://www.in-study.org/uploads/1/3/0/5/130590443/a2a4be6f372ad.pdf
    • http://consors.org.uk/uploads/1/3/0/3/130324011/pawofaded-gidigufoge.pdf
    • http://exfdainspectors.com/uploads/1/3/0/4/130476650/2d6b7b4e094a3d1.pdf
    • http://vintagelabergman.com/uploads/1/3/0/9/130969904/64992.pdf
    • http://rooforest.com/uploads/1/3/0/9/130969731/safugezize.pdf
    • http://qaoi.org/uploads/1/3/0/2/130291784/e07a57844.pdf
    • http://drswanod.com/uploads/1/3/0/5/130542907/derawukofero.pdf
    • http://nationalarchivesphotographer.com/uploads/1/3/0/3/130379371/bitazevidopa_wasuni.pdf
    • http://cpanel.gammaxiques.org/uploads/1/3/0/5/130540178/130540178.html#asthma+gina+classification

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000029bc.bin
219f2f300e78958ff735d94fef1f55d579d097ff591bda880458b6b6e3dd1c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29BC 7972 bytes

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