Malicious PDF — malware analysis report

Static analysis result for SHA-256 00867f86bccfd658…

MALICIOUS

PDF

54.9 KB Authoring application: Mobipocket Creator
MD5: b0ab0e452cead7a184ce7d20b49e9b1f SHA-1: 1bb0a42789762f288ca5fd84668ee3829a306d06 SHA-256: 00867f86bccfd658482a907bafdd718d3f73265fd790cad6e95baa7562e541c7
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO poisoning or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing further malicious content or redirecting users to phishing sites. No scripts were extracted, and the document body is heavily obfuscated.

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://cielocopy.com/uploads/1/3/0/2/130289340/8625416.pdf
    • http://bakersman.ca/uploads/1/3/0/6/130605292/folozudowina_sofusi.pdf
    • http://killerwaxxgeorgia.com/uploads/1/3/0/6/130604024/ripobes_duzamimozevi_finumewanijaman_wuriwatitow.pdf
    • http://www.onelifeincrescueandrehab.org/uploads/1/3/0/2/130272443/2821602.pdf
    • http://bdcont.com/uploads/1/3/0/4/130476766/kisuwatixilul.pdf
    • http://wikiword.biz/uploads/1/3/0/6/130604240/6e7850769.pdf
    • http://finbitgroup.org/uploads/1/3/0/6/130639643/fozimitazexefav.pdf
    • http://avneetbansal.com/uploads/1/3/0/4/130489527/tozarigexezeri.pdf
    • http://patometry.com/uploads/1/3/0/5/130539840/jipozumase.pdf
    • http://zhiraf.site/uploads/1/3/0/3/130323622/mezajixiwomi.pdf
    • http://iotaphilambdanorfolk.gammaxiques.org/uploads/1/3/0/6/130605393/130605393.html#complete+avulsion+brachial+plexus+injury

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113d.bin
cbb15bc6e8144efaee1f468c89729f9ed6402ab2c933f1c46fb2a0ab1ab34350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D 9144 bytes

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