Malicious PDF — malware analysis report

Static analysis result for SHA-256 463e867eb037204b…

MALICIOUS

PDF

35.4 KB Created: 2020-05-18 10:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32308595885bedb9efbe49c4b3f23d2a SHA-1: 6888d1da3dd68df5392c49ea4e842c431dc95430 SHA-256: 463e867eb037204b785ceffde8ac8526e3af52408c104b60fef891b1700dc62b
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The embedded URLs are likely used to redirect users to malicious websites or to distribute further malware. No scripts were extracted from this sample.

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://kohno-corp.com/uploads/1/3/1/4/131406569/131406569.html#sql+database+pdf+free
    • http://pathfindermusicgroup.net/uploads/1/3/0/8/130874671/nafakirugofemo-mujizavuvav.pdf
    • http://deafaccessibilitynetwork.ca/uploads/1/3/0/2/130273766/kupirixinutinudefo.pdf
    • http://v-i.biz/uploads/1/3/0/4/130478868/rumeduzo_mapejepewofel_wabelovusote.pdf
    • http://mrmrsroachnationalambassadors.com/uploads/1/3/1/4/131406105/vovixorefevon-juzopoves.pdf
    • http://stepping-stones-learning-academy.com/uploads/1/3/0/2/130291556/cdbec4858df99f.pdf
    • http://lashesbyelizabeth.net/uploads/1/3/0/7/130775195/fikopibowatuvep.pdf
    • http://psiclilianlemuscampos.com/uploads/1/3/1/8/131871531/666932.pdf
    • http://brixhamcollege.com/uploads/1/3/1/4/131438353/5312516.pdf
    • http://sxull.net/uploads/1/3/1/4/131455024/fosulogisuputo.pdf
    • http://forthekidsroofing.com/uploads/1/3/1/4/131408954/fovifedomajem.pdf
    • http://terrorsofresistance.com/uploads/1/3/1/4/131437471/pilikeraz.pdf
    • http://pedalsofcourage.com/uploads/1/3/0/6/130604855/2187676.pdf
    • http://viplimoserviceneworleans.com/uploads/1/3/0/3/130323322/565812.pdf
    • http://2enkindle.com/uploads/1/3/0/6/130621165/8259685.pdf
    • http://gatewayhobbies.com/uploads/1/3/0/2/130288533/paxiranopolisigez.pdf
    • http://thetimeshareadvocate.com/uploads/1/3/0/6/130621158/jurakexebarimi.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_off0000616a.bin
64b0805ecaefe2e8c9e273bfe336c436705aa7f72cb37378406931e9680980b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 9756 bytes

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