Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed7385fd8f46d67…

MALICIOUS

PDF

39.3 KB Created: 2020-03-30 18:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5c86316a2b4aae5ca6efd74219c738fd SHA-1: 891b2ea6c3b47cb79c03a5863e479aa4f8659aac SHA-256: 3ed7385fd8f46d675f4eb2eb4d4caf87818a4b3a37cbea3d7ce063cca4bc9e44
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs such as http://mychoicemedicalpractice.com/uploads/1/3/0/6/130639646/130639646.html#ejercicios+sucesiones+resueltos+universidad and http://maurineharris.com/uploads/1/3/0/8/130813710/7921584.pdf. This suggests a link farm or SEO manipulation tactic, potentially to distribute malicious content or improve search engine ranking for undesirable sites.

Heuristics 3

  • 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
  • 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://mychoicemedicalpractice.com/uploads/1/3/0/6/130639646/130639646.html#ejercicios+sucesiones+resueltos+universidad
    • http://maurineharris.com/uploads/1/3/0/8/130813710/7921584.pdf
    • http://annieluchsinger.com/uploads/1/3/1/4/131406749/33dce2.pdf
    • http://mlconsultores.net/uploads/1/3/0/5/130550838/rexoxevurapuxodon.pdf
    • http://angellashandbeauty.com/uploads/1/3/0/7/130776567/2872057.pdf
    • http://rvhsfineartsboosters.com/uploads/1/3/0/2/130272851/dezabizixafuwu-gorabakibare.pdf
    • http://ncfse.com/uploads/1/3/0/5/130588749/9708165.pdf
    • http://olanupcycled.com/uploads/1/3/0/7/130739154/ca5ec7974699.pdf
    • http://noblecertainties.com/uploads/1/3/0/7/130775509/5164763.pdf
    • http://dinadeljanin.com/uploads/1/3/0/9/130969950/d434d25095f6.pdf
    • http://cubesecurity.net/uploads/1/3/0/2/130292110/dadiximat-regevuz-lanugasofok.pdf
    • http://kelleyraebass.com/uploads/1/3/1/1/131164294/kogux_kalinuvidiniju_tesikujim.pdf
    • http://darkhorseprovisions.com/uploads/1/3/0/7/130739601/batomuwobub_fewuviguvi.pdf
    • http://subprimalmeats.com/uploads/1/3/1/3/131380746/wukagamimetuje.pdf
    • http://hairwithamy.com/uploads/1/3/0/9/130969242/nelamokexiruv.pdf
    • http://iwifihelp.com/uploads/1/3/0/3/130323666/bumaxulato_gimamulikonejux.pdf
    • http://shotwellanalytics.com/uploads/1/3/0/7/130740461/7619407.pdf
    • http://studiocityluxurycarrental.com/uploads/1/3/0/7/130738837/babomanafuze.pdf
    • http://reelbrothersbassn.com/uploads/1/3/0/4/130436173/rabiboxexeme-wikufazagofe-kulazo.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_off00006ae4.bin
fee2f073b33f37da35e300f20a6b5f14f34b7f214193305e8e38e07403d26c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 9844 bytes

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