Malicious PDF — malware analysis report

Static analysis result for SHA-256 533ca3109530ebc5…

MALICIOUS

PDF

52.7 KB Authoring application: Scribus
MD5: 9d7821b7eac35166f8be371ca1bc0bdd SHA-1: 042c25f4e4830706f0996e5e69539c2206134e88 SHA-256: 533ca3109530ebc5f795d6768994b5feb995fbfc3d7f2ab23d2e8725f65b9b93
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body text is heavily corrupted, but the presence of URLs and the heuristic firings are sufficient to assess the attack pattern.

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://gofidijat.lpmti.com/uploads/2020/01/29/da0f1809e.pdf
    • http://moneyforpropertydamage.com/uploads/1/3/0/2/130271049/josefokosajoritugiro.pdf
    • http://152811427883146431.com/uploads/1/3/0/4/130476499/sapamidemi-lugekusen-posiradepadibo.pdf
    • http://mountainfestival.org/uploads/1/3/0/4/130435644/f5b749ffd4e.pdf
    • http://naplesmarketresearch.com/uploads/1/3/0/4/130483397/samivimi-binijalax-vekidekozibiwas.pdf
    • http://marketresiliency.com/uploads/1/3/0/2/130271042/rawebekijapafa-wonave-tajomal-ruvatax.pdf
    • http://braveandgentle.net/uploads/1/3/0/3/130323647/derozi_fexola_xasolixipusit.pdf
    • http://cakzglamdepo.com/uploads/1/3/0/2/130289290/farimi.pdf
    • http://jalksjdlfkjslkjf01.space/uploads/1/3/0/4/130476214/xatejakovi_zutetopolobatil_zexewu.pdf
    • http://newimagesfencing.com/uploads/1/3/0/3/130323675/gododuxa_gafeturoreto.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/5/130551991/130551991.html#eliquis+and+spinal

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001363.bin
8bf9cb42e1d94707fa676b05b9c5d4c8466bd551db15c13a70f510c4fda024e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1363 9100 bytes
font_01_sfnt_off00007f5b.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5B 16036 bytes
font_02_sfnt_off00009372.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9372 2668 bytes

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