Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a9eed2603f2932…

MALICIOUS

PDF

71.9 KB Authoring application: pstoedit
MD5: 2b9be8a2fb936304cb97546da151284d SHA-1: 2b8380bc6ffe7c42795ca1b9bffbecf70a848cb9 SHA-256: 84a9eed2603f293293836334a8f1661df8a1cae7b29f6e1030fc954ac0d3f948
192 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links to external PDF files hosted on various domains. The heuristic firings indicate this is a link farm designed to distribute content, and ClamAV identified it as phishing malware. The ML classifier also strongly flagged it as malicious. The embedded document body text appears to be corrupted or irrelevant, providing no direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.professionalaudreywilson.com/uploads/1/3/0/7/130775729/jijel.pdf
    • http://krisprfarms.com/uploads/1/3/0/2/130288520/rosubuwuz_kezuzituw_gosunodolo_duwareterewirum.pdf
    • http://raggedytees.com/uploads/1/3/0/8/130813785/fc5b85fb917fbf.pdf
    • http://lovelykacie.com/uploads/1/3/0/8/130814645/godawijoxabid.pdf
    • http://endureclothing.com/uploads/1/3/0/5/130539092/d24dddd8.pdf
    • http://iamthomas.org/uploads/1/3/0/7/130776394/0defb4e.pdf
    • http://74-123-77-33.mgwnet.com/uploads/1/3/0/2/130272619/31b2e.pdf
    • http://topcincinnatibeautysalontraining.com/uploads/1/3/0/2/130271090/6206427.pdf
    • http://mr-riks.com/uploads/1/3/0/2/130289523/7f2900.pdf
    • http://milwaukeeaccesssecuritysystems.com/uploads/1/3/0/7/130775249/3e638cdc6.pdf
    • http://www.locsmithnaturalhairlounge.com/uploads/1/3/0/6/130620234/wixubalom-mibuvo.pdf
    • http://jongrahamphoto.com/uploads/1/3/0/5/130543656/lujowovuzulubi_vuvokoxuvoxanil_zuruz.pdf
    • http://babydollscakes.com/uploads/1/3/0/6/130639842/4a643.pdf
    • http://saltlifedesigns.com/uploads/1/3/0/9/130969026/130969026.html#world+economic+forum+centre+for+the+4th+industrial+revolution

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000295f.bin
e716a1b09da49b57f5860cf631d63fad2ed7307431b2fb577f4c678f36ea19e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x295F 10708 bytes

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