Malicious PDF — malware analysis report

Static analysis result for SHA-256 383683e5f2616e14…

MALICIOUS

PDF

37.4 KB Authoring application: Solid Converter PDF
MD5: 2b253be187b47386ae0c881989d54357 SHA-1: e187aa120084434ce313a00c3b5e60eee0257949 SHA-256: 383683e5f2616e143611ba3d660b1f3945964bc6837f506cb78c05bdcec62742
152 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files, a technique commonly used for SEO spam or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. The document body text is heavily corrupted and does not provide further context on the specific lure.

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://www.bearam.com/uploads/1/3/0/3/130323659/4da43ee90ce92.pdf
    • http://rsllcw.com/uploads/1/3/0/6/130639592/dopawazemolafo.pdf
    • http://alchemyoftime.com/uploads/1/3/0/8/130814280/xazorofebawikatusivi.pdf
    • http://nbagauntlet.com/uploads/1/3/0/2/130287873/gifozora.pdf
    • http://dallascounselors.org/uploads/1/3/0/6/130604105/4661367.pdf
    • http://iglesiamulticulturalwestside.com/uploads/1/3/0/3/130323972/daduxifowakolemugo.pdf
    • http://www.superioralkaline.com/uploads/1/3/0/6/130620468/rejogawesu_puvikimiz.pdf
    • http://amityschuyler.com/uploads/1/3/0/2/130289775/zipabibi.pdf
    • http://bcummings4.com/uploads/1/3/0/6/130620300/613fffc.pdf
    • http://suchesfarmersmarket.com/uploads/1/3/0/6/130621864/68e8e2859.pdf
    • http://boomerangpilatesandwellness.com/uploads/1/3/0/7/130776275/milat.pdf
    • http://painterpro62.com/uploads/1/3/0/9/130969242/281930.pdf
    • http://geekmediapro.com/uploads/1/3/0/7/130740419/fakugo.pdf
    • http://lykkenkommerindefra.dk/uploads/1/3/0/4/130435962/130435962.html#maths+worksheets+for+year+1+australia
    • http://boomerangpilatesandwellness.com/uploads/1/3/0/7/130776275/mil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b0a.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0A 2652 bytes
font_01_sfnt_off0000373c.bin
d6370581ffe18461338577cf710ea1721856b95692d6113c8e17c551c12c85e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x373C 8544 bytes

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