Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa54f0feef7641b8…

MALICIOUS

PDF

42.6 KB Authoring application: Poppler-utils
MD5: 00c9e2dba0967334d90ee54ebe93dffe SHA-1: 747c08fe2e480330a6be7c0915366fa42c65be18 SHA-256: fa54f0feef7641b89e72eafd05afa93ab8102ba7196b4a67330fb97bed5699b4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to solving quadratic equations, which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://statesvstaxscam.com/uploads/1/3/0/5/130588710/koxavuf-gakerim-zupukokusogeru.pdf
    • http://whiteculture.net/uploads/1/3/0/6/130639454/3317943.pdf
    • http://baughmansmagicseal.com/uploads/1/3/0/4/130488121/mipol_gibexom_midimel.pdf
    • http://chrysalisholistics.com/uploads/1/3/0/6/130621345/xexagepusukufi_bunafofopos_fejuvogita_fodulagenuniwo.pdf
    • http://mommymouth.com/uploads/1/3/0/7/130776143/pumekoduluwim.pdf
    • http://mindfulnessmatters.online/uploads/1/3/0/6/130621459/f260e71125.pdf
    • http://meteorite-village-happytour.com/uploads/1/3/0/6/130621646/7685179.pdf
    • http://onestoneworks.com/uploads/1/3/0/2/130287394/jobaxifaxukazek.pdf
    • http://staurfoods.com/uploads/1/3/0/6/130639082/787147c1cfe.pdf
    • http://www.tucsoninabox.com/uploads/1/3/0/7/130738716/e4f5e543.pdf
    • http://ravencon.org/uploads/1/3/0/6/130605253/9365360.pdf
    • http://dreamydo.com/uploads/1/3/0/6/130620859/gapoximu.pdf
    • http://bearsvbabiesgame.net/uploads/1/3/0/4/130435583/fb349598a4.pdf
    • http://hostmaster.ginaniebergall.com/uploads/1/3/0/4/130489230/laloravixup.pdf
    • http://pakfitness.ca/uploads/1/3/0/6/130604945/rebib_nixitejoj_mezokutururide.pdf
    • http://saint-anns.com/uploads/1/3/0/6/130604081/1516814.pdf
    • http://sacredcirclecounseling.com/uploads/1/3/0/2/130271063/pudij.pdf
    • http://hotelfullerton.devsite-1.com/uploads/1/3/0/4/130476172/130476172.html#solving+quadratic+equations+by+extracting+square+roots+ppt

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000251a.bin
3e9a9dfb40a01f9f7c9c545b28ba37f1de74591f2b47bc69a9983f40f3f3ebd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251A 16080 bytes
font_01_sfnt_off0000396e.bin
985cbd9ba5b629f1b749d04d852c0eecb5d8ad374186a1044a60da9476420dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x396E 2788 bytes
font_02_sfnt_off00004628.bin
4ce99eba14bfdd7e7a28df90a12787f7f746ca6f1c1a78d5a7f911a27fce9ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4628 8960 bytes

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