Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c79477b80df724c…

MALICIOUS

PDF

32.9 KB Created: 2020-05-15 18:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c178096f4b465cdfda51901b39197336 SHA-1: 49760f55acab4332553dfe912afef7e26ae2b732 SHA-256: 6c79477b80df724c7a433ba7146653742e9de2c05e7c9a2c883595cdce485a0b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified as a 'link farm' heuristic. These links point to numerous PDF files hosted on various domains, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://ajshomebakedmore.com/uploads/1/3/1/4/131453969/131453969.html#bali+pathfinder+map+pdf
    • http://deceptionsucks.com/uploads/1/3/0/7/130739128/7b207369699b.pdf
    • http://autumnjean.com/uploads/1/3/0/6/130605347/gajazofivorob-gagapufa.pdf
    • http://grfinishescontractors.com/uploads/1/3/0/5/130589283/kixefufeju_butate.pdf
    • http://carequeensland.com/uploads/1/3/0/8/130814715/1147207.pdf
    • http://bouguereauhd.com/uploads/1/3/0/7/130739575/gasenok_bexupegomu_nuraxosunut_jedotixenudupog.pdf
    • http://johnkoonconstruction.com/uploads/1/3/1/6/131636712/b0e809a3a.pdf
    • http://onsitelogisticsgroup.com/uploads/1/3/1/4/131407281/kaguv_jibibaz_vogolusupude_kezejababe.pdf
    • http://kangenwaterdaily.com/uploads/1/3/0/7/130738921/4940533.pdf
    • http://findfinancialfreedom.me/uploads/1/3/0/5/130540683/5979407.pdf
    • http://bwmin.org/uploads/1/3/0/7/130739816/xoboruxeberija.pdf
    • http://underthescope.net/uploads/1/3/0/4/130435803/tiririkajisu.pdf
    • http://mirartconsulting.com/uploads/1/3/1/4/131453151/7272046.pdf
    • http://cfneu.org/uploads/1/3/0/4/130483616/fevenuzosuno_lumiguvisedafa.pdf
    • http://mackmccullough.com/uploads/1/3/0/5/130589331/3098097.pdf
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005671.bin
0e8193184cddff4bc0103c9bfb9858e7cae328abeaa58658b4e18c404f36b0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5671 10008 bytes

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