Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0225c10fb6e71c…

MALICIOUS

PDF

31.3 KB Created: 2020-05-18 15:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9eface881c3e7038f0c19c709a8903 SHA-1: a173944009683f8cf8054afd8b7a588dac0157d4 SHA-256: 6d0225c10fb6e71cfb06b99f2e4405862e31ada638fd30b65bca882da70d3c4f
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. These links likely serve to manipulate search engine results or lead users to malicious content, rather than providing any legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://khpottery.com/uploads/1/3/0/6/130621238/130621238.html#old+telugu+songs+ringtones
    • http://zachsphotographyurls.com/uploads/1/3/0/8/130813115/3162029.pdf
    • http://alvinnazarene.org/uploads/1/3/0/5/130550998/nexitapibeta.pdf
    • http://apsleepingindian.com/uploads/1/3/0/9/130969816/c7ce082655d2750.pdf
    • http://accommodatingactivities.com/uploads/1/3/0/7/130739937/7121793.pdf
    • http://vivalavida.dance/uploads/1/3/0/6/130621185/vovitesivetenunetix.pdf
    • http://thegoatgranny.com/uploads/1/3/0/6/130640218/tujapimumidusop.pdf
    • http://scadacomponents.com/uploads/1/3/1/8/131856757/dofabidobutebel-jidilafodotidot.pdf
    • http://club-cuisteau.com/uploads/1/3/0/2/130289765/lazilepematasasu.pdf
    • http://my-kleen.com/uploads/1/3/0/7/130739786/f1f4985714e06f.pdf
    • http://ebanindy.com/uploads/1/3/0/3/130323959/42bbe9410f.pdf
    • http://lyranarts.com/uploads/1/3/0/8/130874307/2348331.pdf
    • http://roseanettesdesigns.com/uploads/1/3/1/3/131398010/pigidegaxopir.pdf
    • http://happylifedecor.com/uploads/1/3/0/8/130874514/zomonilopi.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004794.bin
31f42a95b25401d149eda9e95a52e6d9b635c8c2f366ed837f420d5199903aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4794 2496 bytes
font_01_sfnt_off000052e6.bin
594fa373788c9f6645615ff16b82b63e98b2f168f8d720741a1acc172a56cf18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E6 9404 bytes

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