Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a438e68c3f09377…

MALICIOUS

PDF

44.6 KB Authoring application: OpenOffice.org
MD5: dda382a098f4652d50705d5e938c8792 SHA-1: 2d696152677f53e6b4e5d69d6b05c68d6021286a SHA-256: 1a438e68c3f093775d1b864b3ef06b91473bb11f6903849bf88355fbdedfe22b
150 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of embedded URLs pointing to other PDF files hosted on various domains, indicating a link farm strategy. The document body contains fragmented text related to meningitis, which appears to be a lure to disguise the malicious intent of redirecting users to external content.

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://acsnutritionfitness.com/uploads/1/3/0/8/130813903/6497969.pdf
    • http://on3pose.com/uploads/1/3/0/2/130270893/pilebalawarufon.pdf
    • http://nihaostyle.com/uploads/1/3/0/2/130289682/panogizutumege.pdf
    • http://rebeljmarket.com/uploads/1/3/0/6/130639885/64b17c139e.pdf
    • http://ragnarlegend.com/uploads/1/3/0/6/130622076/af94faea09f039.pdf
    • http://missoulalawoffice.com/uploads/1/3/0/6/130603994/vipezegag.pdf
    • http://www.nimbustour.com/uploads/1/3/0/2/130288392/69122d95843eb.pdf
    • http://www.brettfeddersen.com/uploads/1/3/0/2/130270742/103922.pdf
    • http://edens-hope.com/uploads/1/3/0/7/130775249/wavafurifokakez.pdf
    • http://kissimmeehomesforsale.net/uploads/1/3/0/5/130590371/regil.pdf
    • http://adobedelsolpropertysolutions.com/uploads/1/3/0/7/130740060/8529107.pdf
    • http://dianehenning-luce.com/uploads/1/3/0/6/130621202/fuxonojola.pdf
    • http://courtney-karr-se-1.rominastiebenphotography.com/uploads/1/3/0/6/130605228/130605228.html#meningitis+pdf+pediatric

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000485b.bin
4eddde7aaf587a3ffc2ce72f33809f71621ee337639e66f0feccadd0fa6f0b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485B 1860 bytes
font_01_sfnt_off000053c1.bin
e50bb1a144f447d3a5890619086186609ae9f081856110dd4309b33174722291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C1 8984 bytes

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