Malicious PDF — malware analysis report

Static analysis result for SHA-256 540537d82a69ffd8…

MALICIOUS

PDF

60.6 KB Authoring application: ImageMagick
MD5: af6a1d85df747db91e04fd7b7d9f6853 SHA-1: 8c3624dd8b154f84081f15bd5e810087de061688 SHA-256: 540537d82a69ffd82dac0ec2334311c93ac7c418c6328364b36a688be79d345b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://norfolknyfire.org/uploads/1/3/0/4/130489564/2715630.pdf
    • http://benton-jp.com/uploads/1/3/0/3/130379222/wobowawa.pdf
    • http://mig-computer.org/uploads/1/3/0/2/130288391/lotanidir.pdf
    • http://signaturepropertysolutions.net/uploads/1/3/0/8/130814007/4781360.pdf
    • http://small.moisescastro.com/uploads/1/3/0/7/130775029/8397565.pdf
    • http://assortedartistries.net/uploads/1/3/0/6/130604737/6b9bc50a.pdf
    • http://mobastrategy.com/uploads/1/3/0/8/130813966/1219158.pdf
    • http://mynorthlakedemo.com/uploads/1/3/0/8/130814009/dademot.pdf
    • http://beachsack.net/uploads/1/3/0/5/130541624/1604530.pdf
    • http://cherubgame.com/uploads/1/3/0/7/130738890/5196806.pdf
    • http://beckandbloom.com/uploads/1/3/0/8/130874366/643e2b5af36.pdf
    • http://chaliceoakfoundation.org/uploads/1/3/0/2/130291415/7552672.pdf
    • http://moses-michael.com/uploads/1/3/0/5/130547150/6495710.pdf
    • http://convegnoartemercatosiena.com/uploads/1/3/0/6/130604176/aefdeb3.pdf
    • http://churrch.life/uploads/1/3/0/5/130590029/zenutip.pdf
    • http://adentaitalia.com/uploads/1/3/0/3/130313237/kuwajozumojekivusok.pdf
    • http://replayacademy.net/uploads/1/3/0/7/130739475/kenixukime_xebarusagewarak_siwanenuwap_gemagaj.pdf
    • http://bestofbaliadelaide.com/uploads/1/3/0/5/130588907/a6a9e412.pdf
    • http://asfound.org/uploads/1/3/0/6/130621516/dogomojoj_fimezivatot_midivegon_gokup.pdf
    • http://sooperda.com/uploads/1/3/0/7/130775639/157ac2.pdf
    • http://spayedkoolie.com/uploads/1/3/0/6/130621053/fidorolideto.pdf
    • http://newyorkwinelaw.com/uploads/1/3/0/6/130621800/7172690.pdf
    • http://chunchorecords.com/uploads/1/3/0/4/130476738/c6ef12d775.pdf
    • http://officer.mediutopia.com/uploads/1/3/0/4/130483990/130483990.html#arduino+mega+2560+programmer+is+not+responding

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000154a.bin
1b2f8909409c75918a52f63c0dda1f9b4c7cf6b5f13ce87a763b51de43a04be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154A 8772 bytes
font_01_sfnt_off0000ae23.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE23 2652 bytes

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