Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b729d1c6638bc5c…

MALICIOUS

PDF

43.1 KB Created: 2020-03-16 05:19:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7673daace0a0bee02fc21a545670c6e8 SHA-1: 0ecbd670c84b74bd7bc9eabc193d9b4121bc8b44 SHA-256: 6b729d1c6638bc5cc6d86422847a776bd863f26b15f1e9390d426c46dcda6ad8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The embedded document body text, though partially corrupted, contains URLs that are also listed in the extracted URLs. These URLs likely lead to further malicious content or phishing pages. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to potentially harmful websites.

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://vps11-internal.pleasingfood.com/uploads/1/3/0/6/130604871/130604871.html#fallen+order+guide+bogano
    • http://cherryclarkfurniture.com/uploads/1/3/0/6/130605010/tawafomaj-xowezuzok-namozunalap-wuxigof.pdf
    • http://voicesofdeclaration.com/uploads/1/3/0/3/130379083/fivopa-zitid.pdf
    • http://eessw.eesforjobs.com/uploads/1/3/0/4/130477663/0ed1c1185f2.pdf
    • http://leslie-marshall.com/uploads/1/3/0/5/130588865/pigagej_lutokisadudo_woderobepodumer.pdf
    • http://parislineone.com/uploads/1/3/0/4/130477613/susamawavufazubobaxo.pdf
    • http://valere.us/uploads/1/3/0/5/130544954/724965.pdf
    • http://lean4teensllc.com/uploads/1/3/0/6/130640144/bajogatopewev.pdf
    • http://beyoncebus.com/uploads/1/3/0/6/130604255/digibinewok_ninevog.pdf
    • http://hamandhistoire.com/uploads/1/3/0/5/130588876/monasatonabamezo.pdf
    • http://keragency.com/uploads/1/3/0/2/130271009/1ef18934b2c5b3.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_off0000815c.bin
e4abfec2b9c1bef026e30078302fc3331fdb5811bf22fe2806f5b244a408165e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815C 7792 bytes

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