Malicious PDF — malware analysis report

Static analysis result for SHA-256 da89695bccdd7862…

MALICIOUS

PDF

40.5 KB Authoring application: Mobipocket Creator
MD5: 259cb0bb45ffdea5f734114ecf301cc9 SHA-1: 43082fe784d139587243e5a224eea37d51258fb2 SHA-256: da89695bccdd7862f06dabdbb5822d889aced2d47ec83da73e498730bede61b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting the primary purpose is to redirect users to malicious content.

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://alchemyoftime.com/uploads/1/3/0/7/130775921/ce32459a0f3.pdf
    • http://herrinservicecenter.com/uploads/1/3/0/5/130539885/1436561.pdf
    • http://mail.icperugia13.gov.it/uploads/1/3/0/8/130873958/kijatesasu.pdf
    • http://www.thewindingsheetoutfit.org/uploads/1/3/0/6/130639105/riwugokukad.pdf
    • http://vyev.com/uploads/1/3/0/7/130776267/895815.pdf
    • http://imedregeneration.net/uploads/1/3/0/7/130776295/6fb4f77735.pdf
    • http://zesalvador71.com/uploads/1/3/0/2/130289597/ec1d456e76b5b.pdf
    • http://www.bristolpianist.co.uk/uploads/1/3/0/3/130323362/74bfb3ace59017.pdf
    • http://michiganroofmasters.com/uploads/1/3/0/6/130620882/torewom.pdf
    • http://artistbrendahenry.com/uploads/1/3/0/4/130483900/pafuxane_naborogi.pdf
    • http://libertodos.org/uploads/1/3/0/4/130483527/komijejivurafa-zelufid-sidenifip-tumepimuf.pdf
    • http://northeastflowershop.com/uploads/1/3/0/6/130603943/zijategamute.pdf
    • http://neoaxethrowing.com/uploads/1/3/0/5/130588968/wewujosepevotoko.pdf
    • http://www.candicemjewell.co.uk/uploads/1/3/0/8/130814581/niwifalefozen.pdf
    • http://lodgewellnesscenter.com/uploads/1/3/0/6/130620728/959dd677c3c2fc.pdf
    • http://citizensarmory.net/uploads/1/3/0/2/130273884/8039994.pdf
    • http://nickjanelandscape.com/uploads/1/3/0/6/130604944/7cd5e5b8d8.pdf
    • http://insightmedicine.net/uploads/1/3/0/3/130323936/6260312.pdf
    • http://whichcredit-card.com/uploads/1/3/0/7/130739140/fiboseki.pdf
    • http://morganvalleycandles.com/uploads/1/3/0/9/130969644/1baf2011b58.pdf
    • http://ncmaf.com/uploads/1/3/0/2/130289158/2573141.pdf
    • http://mettleheart.com/uploads/1/3/0/5/130590374/8541881.pdf
    • http://terrasustainable.com/uploads/1/3/0/8/130874163/99dc25099136579.pdf
    • http://rolfeimages.us/uploads/1/3/0/3/130323374/fawakiw-rulovuj-nidebubogile-zagogojonug.pdf
    • http://dedicated-8.pleasingfood.com/uploads/1/3/0/4/130492038/130492038.html#symptoms+of+malignant+adrenal+tumors
    • http://insightmedicin
    • http://logros.nm.org/uploads/1/3/0/2/130272981/nulijukanuwe.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a03.bin
943ab7846254d281baa7e6c9b7f8bf02814a5536beee873c980949a9166fab10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A03 7884 bytes

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