Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9251735926dc7f4…

MALICIOUS

PDF

56.2 KB Created: 2020-03-30 03:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: ac18214a4d045f60bec7ce4c8532ea36 SHA-1: 9348eb190b7e3da391b84a57b067a507c1264a9d SHA-256: c9251735926dc7f4cdb14e22a68ebe5357d38e265bb52dbdff048a6964107493
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body contains a deceptive title related to ticket prices and includes the authoring application and creation date, which are likely artifacts of the generation process. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm.

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://mysoundcollective.com/uploads/1/3/0/3/130324416/130324416.html#the+cursed+child+ticket+prices PDF link annotation
    • http://kentkilpatrick.com/uploads/1/3/0/6/130604758/8515f2a9e78.pdfIn PDF document text
    • http://bullhavenbulldogs.com/uploads/1/3/0/6/130639762/360927e.pdfIn PDF document text
    • http://aceintheholeentertainment.com/uploads/1/3/0/6/130621077/64693.pdfIn PDF document text
    • http://thehookofcrochet.com/uploads/1/3/0/4/130475955/7d0a2d06e4fd8a.pdfIn PDF document text
    • http://southernlandmanagement.net/uploads/1/3/0/6/130620486/2099395.pdfIn PDF document text
    • http://tanayahhomes.com/uploads/1/3/0/4/130478057/sudofilalarunabak.pdfIn PDF document text
    • http://streetsarerunways.com/uploads/1/3/0/3/130379428/rurale.pdfIn PDF document text
    • http://bestbootcamphawaii.com/uploads/1/3/0/3/130379463/b16f46bd7840.pdfIn PDF document text
    • http://paraschemic.com/uploads/1/3/0/3/130313067/sejawolefomefex.pdfIn PDF document text
    • http://okanaganfarmfresh.com/uploads/1/3/1/1/131163908/02262e889.pdfIn PDF document text
    • http://apexfrontier.com/uploads/1/3/0/5/130588659/gazabiza.pdfIn PDF document text
    • http://creperian.com/uploads/1/3/0/5/130590499/e37e6ab3a9.pdfIn PDF document text
    • http://radicalmxsports.com/uploads/1/3/0/4/130488810/73d5f8e.pdfIn PDF document text
    • http://mnproperties-id.com/uploads/1/3/0/5/130540795/padibeto.pdfIn PDF document text
    • http://alphalove.com/uploads/1/3/1/3/131384468/gaxaxakivu.pdfIn PDF document text
    • http://stylebymissnina.com/uploads/1/3/0/5/130589220/78469268b4e.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
🗂 Part of campaign: aceintheholeentertainment.com 5 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD88 10216 bytes
SHA-256: 530f755d5c184364d596ec7b87ef298a3ecd28ad6bf8dc2b68195a027c14759d