Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c591e915ee7b3fb…

MALICIOUS

PDF

55.4 KB Authoring application: Poppler-utils
MD5: e93cd47deb34e6a207f559a295637709 SHA-1: a367228bd3a09f9fb30d3f824a567807e4816e48 SHA-256: 3c591e915ee7b3fb8f270fcb9703f64ba070f7f684776b3cc35915652df1f1e7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text related to cancer, which may be a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.melissasweazy.com/uploads/1/3/0/6/130639419/retupivivuw.pdf
    • http://www.pleazeus.com/uploads/1/3/0/6/130639092/6571345.pdf
    • http://stepupyourspeaking.com/uploads/1/3/0/3/130323342/c71eea.pdf
    • http://mijblaxby.com/uploads/1/3/0/5/130590392/7cc4b.pdf
    • http://vanceburgholinesschurch.com/uploads/1/3/0/4/130483429/kezalenizufu-nijipepabemogi.pdf
    • http://actionhomerepair.com/uploads/1/3/0/3/130379206/nelatuges-fowopenotun.pdf
    • http://steambrush.store/uploads/1/3/0/7/130775727/tusuvapimilol.pdf
    • http://vancuber.com/uploads/1/3/0/7/130739088/c90eabd5d8.pdf
    • http://www.itcouldbu.com/uploads/1/3/0/6/130604314/pajinoxub.pdf
    • http://hitchly.com/uploads/1/3/0/5/130546294/bitejukozaj-ribow.pdf
    • http://hcapittsburgh.com/uploads/1/3/0/5/130545421/2830700.pdf
    • http://salered.com/uploads/1/3/0/5/130551876/9675812.pdf
    • http://wowbrows.net/uploads/1/3/0/2/130272369/defomin.pdf
    • http://tarigolaw.com/uploads/1/3/0/5/130545742/78f88.pdf
    • http://nikosmarinos.com/uploads/1/3/0/7/130740561/e2b2215572d28e.pdf
    • http://duojonssoncoudroy.com/uploads/1/3/0/5/130539843/1705909.pdf
    • http://jerichoroadonline.com/uploads/1/3/0/6/130620910/wadakol.pdf
    • http://georgehoskenjoinery.co.uk/uploads/1/3/0/8/130873958/fofubozadake-bezagox-pafodumegamejo-tazojuwuviwoz.pdf
    • http://tdf20years.com/uploads/1/3/0/5/130589423/ba485f15a6.pdf
    • http://a1381800xstreamtravel.xsideas.com/uploads/1/3/0/6/130620843/130620843.html#carcinoma+espinocelular+no+es%C3%B4fago

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fd6.bin
41e4956a0cc5d95cf91a6b89e9183736136fc1ed912ae0f8eb723e3f29099c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6 11372 bytes
font_01_sfnt_off00008e10.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E10 2652 bytes

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