Malicious PDF — malware analysis report

Static analysis result for SHA-256 662ce9c5129cfc0f…

MALICIOUS

PDF

35.7 KB Created: 2020-04-19 04:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6268f3dc2a33830aef73fa6834e1e712 SHA-1: 9b4b53b864df5a641d58b8f084a0b55d41faf88d SHA-256: 662ce9c5129cfc0f94641cf848bb94f9eb691476972aa8cbaf0405ad98e0d34b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL and numerous other extracted URLs point to external resources, likely intended to host further malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://helpking.org/uploads/1/3/0/5/130588802/130588802.html#imaginary+creatures+94+percent+answers
    • http://espaces.cz/uploads/1/3/0/6/130639768/zatatadavu-romasifuxo-tixexewabepe-paxajupobile.pdf
    • http://muziekstudiogeldermalsen.nl/uploads/1/3/0/8/130874097/5996085.pdf
    • http://daisysdeepcleaning.com/uploads/1/3/0/5/130540033/bumazozaxame.pdf
    • http://kidsedukitchen.com/uploads/1/3/0/5/130543169/mujobikalit_ditagevotot.pdf
    • http://costablancasmokehouse.com/uploads/1/3/1/1/131163858/9033446.pdf
    • http://rbhswe.com/uploads/1/3/0/3/130313643/rulunuvo.pdf
    • http://h3e.biz/uploads/1/3/0/8/130874150/xojodewapuwuzisalena.pdf
    • http://wolfeplaster.com/uploads/1/3/0/6/130639672/9c7a95f9ff.pdf
    • http://hoponthecluebus.com/uploads/1/3/0/2/130289551/makewodug.pdf
    • http://birdholidays.eu/uploads/1/3/1/3/131380354/mafasunaz_ziziragurugazu_jotinatijaxu.pdf
    • http://jaretail.net/uploads/1/3/0/4/130476410/4d5bde9c9a2e5.pdf
    • http://brawlinfo.com/uploads/1/3/1/3/131383821/watativugalobige.pdf
    • http://achinbackranch.com/uploads/1/3/0/6/130621322/gijis.pdf
    • http://mrandmrslynch.net/uploads/1/3/0/3/130313159/3572477.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006376.bin
ca2791da6139194805e30e868487ee66f92c42f9ddc7584796ebe763b25f9049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 8056 bytes

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