Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daf3f1e196b863c…

MALICIOUS

PDF

51.2 KB Created: 2020-04-25 20:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a25c09b9f8e1c4aaa48a39c896fe3794 SHA-1: dc104a9bcd739e61d6874bf965bc8a1843edca16 SHA-256: 3daf3f1e196b863cc22f0cdd83a77c9b8f2504592db7c271324414c67df789b1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, indicating a link farm SEO tactic. The primary URL, http://acnescardoctor.com/uploads/1/3/1/8/131856170/131856170.html#incantations+sheet+music+violin, suggests a lure related to sheet music or violins. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm and the nature of the embedded URLs point to a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://acnescardoctor.com/uploads/1/3/1/8/131856170/131856170.html#incantations+sheet+music+violin
    • http://imperialdesigns.org/uploads/1/3/0/8/130814673/guvilusuzojev_rifitekusiku_midazovazuxo_bujosuza.pdf
    • http://thomfernandez.com/uploads/1/3/0/5/130550986/lawati_vinowagu_dufogeleki.pdf
    • http://williamshaven.com/uploads/1/3/1/4/131483588/baliwesakita.pdf
    • http://outdoorsmetalguy.com/uploads/1/3/0/5/130543840/tusibavokawofipu.pdf
    • http://samanthamelitta.com/uploads/1/3/0/3/130324386/9787230.pdf
    • http://hutchinsontransport.com/uploads/1/3/0/6/130603955/26813c0ad623.pdf
    • http://corvascular.com/uploads/1/3/1/6/131606339/nujewitofinuga_jimatita_xagap_tugipo.pdf
    • http://xn--croferretera-2fb.com/uploads/1/3/1/6/131636833/divugoveji-wogepefaxexisun-balixumin.pdf
    • http://sweetonthebubbly.com/uploads/1/3/0/7/130739867/ea564252f3b416.pdf
    • http://thehistorichartingtonhotel.com/uploads/1/3/0/8/130873982/1629064.pdf
    • http://theboilerfactory.com/uploads/1/3/0/8/130814349/gudalowelunifalev.pdf
    • http://davidsonsautosales.com/uploads/1/3/0/6/130639839/wonugejozujanil-lerobigewojifan.pdf
    • http://braune-galabau.com/uploads/1/3/0/4/130489706/zikunopusi_surikatapufel_lorogew.pdf
    • http://mikewolf1.com/uploads/1/3/0/6/130621072/2350691.pdf
    • http://thehistorichartington
    • 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_off000099a7.bin
531809c1801a2e055f1b4413aff88bcabc893aba4e561b766dd9ce083443d629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A7 10660 bytes

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