Malicious PDF — malware analysis report

Static analysis result for SHA-256 90baaa0e40a66bfc…

MALICIOUS

PDF

34.3 KB Authoring application: Karbon
MD5: a648d0b6511b20b18c3a7121ac9a0bb3 SHA-1: 171c9a4857b08bdd4f17f7f8fc9b188f5db301a3 SHA-256: 90baaa0e40a66bfce47365275cd911a2e9692a938b580361e807976b748f0c5b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs likely serve as a mechanism to distribute further malware or phishing 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://keuritol.com/uploads/1/3/0/5/130588415/zatobogosuwizepi.pdf
    • http://dalotyn.store/uploads/1/3/0/5/130539373/zuwoz.pdf
    • http://piggeriesfurniture.com/uploads/1/3/0/7/130738524/jisizirapixabuk.pdf
    • http://newsmandan.net/uploads/1/3/0/5/130589099/251793.pdf
    • http://projectcleanuluwatu.com/uploads/1/3/0/4/130477064/1adfb49.pdf
    • http://projecttransaction.com/uploads/1/3/0/5/130545827/d2dc82.pdf
    • http://thecreativebdesignco.bettinanorton.com/uploads/1/3/0/2/130289775/a3f7c6a3825c538.pdf
    • http://americasmostwasted.com/uploads/1/3/0/4/130476065/4716c0b57c4.pdf
    • http://ahotel.life/uploads/1/3/0/2/130271142/1cae19c.pdf
    • http://rennrenn.net/uploads/1/3/0/5/130589238/wulode_dadajisoruje_maxogolomusulu.pdf
    • http://usership.com/uploads/1/3/0/3/130313228/punodena_baliguram.pdf
    • http://doctorfieser.com/uploads/1/3/0/8/130874042/422800.pdf
    • http://miraclevalleyceylon.com/uploads/1/3/0/7/130739828/rodixag_genoxepawotiri.pdf
    • http://ysfw.com/uploads/1/3/0/5/130589288/muximarizuvopek-dujatep.pdf
    • http://quanxunwangbeiyongwangzhi.br3h.com/uploads/1/3/0/4/130435922/130435922.html#exercises+for+spine+with+osteoporosis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de7.bin
9f4b8f5d9c086ebe98258e26a2c6563fb79ca0247dc78e58ca61a322c28e7769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE7 7356 bytes

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