Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8157c158a30365…

MALICIOUS

PDF

36.8 KB Authoring application: pdf-parser
MD5: 119dd73ad00f116930be6e881bf4dd77 SHA-1: 20c49fcea36f85c010775467a36b572540176979 SHA-256: 5f8157c158a303652a2996f1675030ae2d9cb4f3fb26236ebd1952cc4a4cb7e4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV and ML heuristics strongly indicate maliciousness, specifically flagging it as phishing-related. The document body content is heavily obfuscated and does not provide clear instructions, but the overall structure and heuristic firings point to a malicious intent to redirect users.

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://michaelmccarthy.net/uploads/1/3/0/5/130588787/8166926.pdf
    • http://hampaidenvalkaisu.net/uploads/1/3/0/4/130435609/684503.pdf
    • http://worldofbowcraft.com/uploads/1/3/0/5/130590577/viseg_xigojazetusig.pdf
    • http://robertduncan.net/uploads/1/3/0/6/130639396/11218.pdf
    • http://courtneyandwillis.com/uploads/1/3/0/6/130621772/c6218ef.pdf
    • http://umrcsalem.org/uploads/1/3/0/7/130738569/talelodupemiva_gawegadezezoju_radokugi.pdf
    • http://nerdvil.com/uploads/1/3/0/3/130313391/1248594.pdf
    • http://personalnetworkappliance.net/uploads/1/3/0/6/130621530/3e0e7c4c331ee4.pdf
    • http://bucknerhn.org/uploads/1/3/0/6/130640239/sipevol.pdf
    • http://bwuethrich.com/uploads/1/3/0/2/130272094/017c1b438db53.pdf
    • http://mercedesschools.com/uploads/1/3/0/4/130477702/jibemaziv.pdf
    • http://nathanieldaiger.com/uploads/1/3/0/6/130620985/8845221.pdf
    • http://speakerboxsupermeet.com/uploads/1/3/0/4/130476348/pivimulaw-pisimexogos-xuvoto-bobuto.pdf
    • http://davidchia.com/uploads/1/3/0/2/130289595/3626c6d32267c81.pdf
    • http://ianbrownbuyersagent.com/uploads/1/3/0/5/130589249/rabuw.pdf
    • http://theballroommarketplace.com/uploads/1/3/0/6/130604241/gadinijimol.pdf
    • http://baylasunhotel.devsite-1.com/uploads/1/3/0/4/130476192/130476192.html#pokemon+route+1+theme+piano+sheet+music

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032ac.bin
4fd45d9cce570713e4675665b87c2b622f6f12e85d69770e8546124208f68f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32AC 9424 bytes

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