Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db2289fcf6b4b7e…

MALICIOUS

PDF

41.8 KB Created: 2020-04-02 04:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de643442b1f49e3b1bfd944e28a267fe SHA-1: d3c031a090b575b706d94a2014a7128f33c39a2a SHA-256: 3db2289fcf6b4b7e53ffde07cfee60c187dc3f74632e4ca1100485fc6c473abd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious (Pdf.Dropper.Agent-7867780-0). It contains a large number of external links, indicating a link farm or SEO spam tactic. The primary purpose appears to be distributing or redirecting to other malicious content via these embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.Dropper.Agent-7867780-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7867780-0
  • 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://ambtcex.com/uploads/1/3/0/6/130639719/130639719.html#bissell+spotclean+pet+pro+portable+carpet+cleaner+2458
    • http://ecuadorusa.com/uploads/1/3/0/4/130483489/xudotuwusufovusa.pdf
    • http://re-imaginarium.com/uploads/1/3/0/7/130739116/9cfa10f3.pdf
    • http://mta-sts.mail.handsurgery.sg/uploads/1/3/0/5/130551091/rexemeramokip.pdf
    • http://shopatouchofsass.com/uploads/1/3/1/0/131070761/14db8d2db1.pdf
    • http://prettiekitteedeals.com/uploads/1/3/0/6/130621353/3270480.pdf
    • http://blendora.com/uploads/1/3/0/5/130540026/bidudipulokovekixele.pdf
    • http://iamauthorsonjarhodes.com/uploads/1/3/0/6/130621309/cc809.pdf
    • http://allseasonplumbingllc.com/uploads/1/3/0/4/130489149/3ed52c724f.pdf
    • http://tmgorgeous.com/uploads/1/3/0/6/130640144/bevilipimureb-xewozibu-vezutigakupa-bimuv.pdf
    • http://shopbelfast.info/uploads/1/3/1/3/131379389/825311.pdf
    • http://garyleerohr.com/uploads/1/3/0/2/130288775/fijikugokorovix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c2.bin
7ca7bd3136c8e031999b73098a339df4f639ed661d706130ddcd647f4a29bc84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 7816 bytes
font_01_sfnt_off00009026.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 2616 bytes

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