Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cbec0a0e991bd5…

MALICIOUS

PDF

42.5 KB Authoring application: Pdftk
MD5: 1a34b36d2c657a73e072e47b5828c113 SHA-1: 582fca3cb5b7ab0c5735731908b609a7ee6344ca SHA-256: 06cbec0a0e991bd53d8972f76140b5394f34888fa0a0ea73bfa2d18bff0c1e2a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the ClamAV detection and ML classifier. The document body is heavily obfuscated and does not provide clear instructions, but the heuristic firings strongly suggest a malicious intent related to link distribution.

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://imgif.com/uploads/1/3/0/5/130540304/serajipemame_mojikuruja.pdf
    • http://quitatlast.com/uploads/1/3/0/6/130604456/naxigekikonuk.pdf
    • http://marybetheasley.net/uploads/1/3/0/4/130490585/40a040c372.pdf
    • http://noeslawncare.info/uploads/1/3/0/8/130873899/vogixibanotu.pdf
    • http://themadkatter.com/uploads/1/3/0/8/130874110/foxutezapewebudowud.pdf
    • http://kbdesignsboston.com/uploads/1/3/0/4/130435706/69717ffbd0.pdf
    • http://bettiefordwasteland.com/uploads/1/3/0/4/130477468/bugelil-jebireborasalad-sipumuzog.pdf
    • http://stsbuildersllc.com/uploads/1/3/0/5/130588639/fazamumexogufibibuv.pdf
    • http://www.joeybruzzese.com/uploads/1/3/0/2/130274355/jisifuxefatinul-sajevowugif-tikunali.pdf
    • http://freerange.shop/uploads/1/3/0/5/130588299/zebav_potonoretenegod_mawosasixakat.pdf
    • http://www.tobi-degetcur.com/uploads/1/3/0/5/130547515/6518295.pdf
    • http://claytonjubbfood.com/uploads/1/3/0/6/130639337/sazolutolokopelo.pdf
    • http://www.woodvaleflorist.com/uploads/1/3/0/6/130605368/teboronedopifexoriwo.pdf
    • http://abstractfact.com/uploads/1/3/0/3/130324112/267b5d16.pdf
    • http://phortehub.com/uploads/1/3/0/4/130435710/f461db27e5.pdf
    • http://collegechristmastree.com/uploads/1/3/0/8/130874115/vezenimivu_fifojujadaripu_pelixajaxu.pdf
    • http://www.stephenhurleyfitness.com/uploads/1/3/0/4/130476885/ad2665949eb3.pdf
    • http://fiendfanzine.club/uploads/1/3/0/5/130550823/raxaga.pdf
    • http://bellinghamlacrosse.com/uploads/1/3/0/6/130620659/1bdc84b3161c80.pdf
    • http://www.sreelectrical.com.au/uploads/1/3/0/2/130289272/2413109a2.pdf
    • http://pooglr.net/uploads/1/3/0/3/130312957/gojojagefizuku.pdf
    • http://74-123-77-236.mgwnet.com/uploads/1/3/0/7/130739664/130739664.html#multiplication+word+problems+worksheets+for+grade+6
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc2.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 16036 bytes
font_01_sfnt_off000046a5.bin
ffc86e359a377976f05b0b79da5617c07ef8060303162e650345e15eaf3e7816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A5 7340 bytes

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