Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d59d13f3c78cee…

MALICIOUS

PDF

47.2 KB Authoring application: Karbon
MD5: cf4855141a52cc6c6ba626faf4b8a201 SHA-1: c6d7043b1e5e27ca0ec07a5e191f2e4428d974c2 SHA-256: 79d59d13f3c78cee7784659a402765a30c1fd1fe8343b42b5f12313ccc74c8f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to a 'sales commission agreement letter' and 'job offer letter', suggesting a social engineering lure to direct users to the malicious URLs.

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://allatjanster.online/uploads/1/3/0/6/130639117/kaxufavirusevexo.pdf
    • http://georginaward.com/uploads/1/3/0/6/130604907/pofunakaxemu-pokefo-vufozipewojaji.pdf
    • http://thebetterbet.co.uk/uploads/1/3/0/5/130551089/mekili.pdf
    • http://tobakebelieve.com/uploads/1/3/0/3/130379336/9b8c90af10ea.pdf
    • http://mylesateliersdenine.com/uploads/1/3/0/4/130488251/4a192b5d2049954.pdf
    • http://artbodysoulstudios.com/uploads/1/3/0/6/130604257/miziliwopafap_jixenuvikegik_najatijoxu.pdf
    • http://basedstickman.com/uploads/1/3/0/2/130289266/2865415.pdf
    • http://montecarloinns.ca/uploads/1/3/0/6/130639676/c8ddd3.pdf
    • http://tillerenergypartners.com/uploads/1/3/0/5/130539102/nejepofil.pdf
    • http://mzphysics.com/uploads/1/3/0/6/130620917/74a5f1.pdf
    • http://moabrecycles.com/uploads/1/3/0/4/130436089/jevox_sekizoxujite.pdf
    • http://alicemcoleman.com/uploads/1/3/0/3/130313086/8119766.pdf
    • http://thesailingbroker.com/uploads/1/3/0/2/130291328/vijanamoz_buveleruxa_misonu.pdf
    • http://mymelgrove.com/uploads/1/3/0/5/130542859/271712.pdf
    • http://spencertunickbooks.com/uploads/1/3/0/7/130739020/towuwev.pdf
    • http://andrewcbachman.com/uploads/1/3/0/5/130589237/8996970.pdf
    • http://edtnetworks.com/uploads/1/3/0/3/130313336/de481e9eff8.pdf
    • http://asteroidnetworks.com/uploads/1/3/0/7/130738704/121e79.pdf
    • http://hostmaster.alacatidolcevita.com/uploads/1/3/0/3/130379549/japusowuka.pdf
    • http://chrysalisholistics.com/uploads/1/3/0/5/130551303/acd6c81d8c2efb.pdf
    • http://jones106.com/uploads/1/3/0/3/130313069/4a04e39a7d8fe.pdf
    • http://ktwines.net/uploads/1/3/0/6/130621498/868fb95c46.pdf
    • http://motivatedqueen.com/uploads/1/3/0/7/130738969/fanis.pdf
    • http://lindholm-family.rominastiebenphotography.com/uploads/1/3/0/6/130604599/130604599.html#sample+sales+commission+agreement+letter
    • http://www.sancsalon.comcastbiz.net/uploads/1/3/0/4/130476501/zobuk.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ed7.bin
4edda6b05473608cf5a695591e8ba67b0da421944adc789589201e7489d6eae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED7 8584 bytes

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