Malicious PDF — malware analysis report

Static analysis result for SHA-256 578dfd86d7b3a876…

MALICIOUS

PDF

47.7 KB Authoring application: GIMP
MD5: adbef641eef5d755423b9e842e221d04 SHA-1: e757ac41d0b13c51804e439a0d4d083236f4af34 SHA-256: 578dfd86d7b3a876c273a5af5b0e55618de1137f9f4456b4403753ef99a06e04
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs likely serve as a lure to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://klickstreet.net/uploads/1/3/0/7/130775879/8717895.pdf
    • http://koekiecookie.com/uploads/1/3/0/4/130488741/1288687.pdf
    • http://balsamrootcatering.com/uploads/1/3/0/6/130639658/somefovidemoxonaj.pdf
    • http://canyonmade.com/uploads/1/3/0/7/130775049/3154acd98f0.pdf
    • http://nickreese.net/uploads/1/3/0/5/130590416/e0c51eb.pdf
    • http://krispykleanautospa.com/uploads/1/3/0/6/130620842/vafewob_zezalaj.pdf
    • http://evergreen-memorials.com/uploads/1/3/0/6/130604255/gemizanebajesuk.pdf
    • http://roseland-retreat.com/uploads/1/3/0/4/130483338/wevodajegizezizix.pdf
    • http://www.chicolitigation.net/uploads/1/3/0/4/130477979/3288006.pdf
    • http://faceshieldgraphics.com/uploads/1/3/0/7/130775199/zebetajogusaze.pdf
    • http://hotelvic-phase2-ko.devsite-1.com/uploads/1/3/0/4/130483322/130483322.html#musnad+ahmad+pdf+english
    • http://balsamrootcatering.com/uploads/1/3/0/6/130639658/somef

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00003a0f.bin
454b852a5eec90c50b02a2f14021501ae5a2a672994ee04ca9d10b87188c3ca9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A0F 23336 bytes
font_01_sfnt_off00006361.bin
7569700d56756193e4867fc075219873cf0d83bf3dc1a0c8af9380af51cdd429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 8740 bytes

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