Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e06b28fb9f4de09…

MALICIOUS

PDF

50.2 KB Created: 2020-04-08 19:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8ce03e98fa851dbd75e0c4533a4d78f6 SHA-1: 5da205344048e1654b179963177be049425e5577 SHA-256: 7e06b28fb9f4de0922d4110a12f3c58029c01562c1f8024a2227ed15443a0259
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded URLs.

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://veronicatouse.com/uploads/1/3/0/7/130775567/130775567.html#control+de+posicion+de+un+motor+dc+p PDF link annotation
    • http://trinitymorrison.com/uploads/1/3/1/3/131398242/ruvigibubiwi-daroxanevokud-momagujurol.pdfIn PDF document text
    • http://handmadedogbeds.com/uploads/1/3/0/7/130738550/8866574.pdfIn PDF document text
    • http://united-support-agents.com/uploads/1/3/0/8/130874585/mazagos.pdfIn PDF document text
    • http://novana.org/uploads/1/3/0/7/130775362/3972972.pdfIn PDF document text
    • http://mimimadeitjs.com/uploads/1/3/0/2/130272328/8185390.pdfIn PDF document text
    • http://giersberg.at/uploads/1/3/0/7/130739764/nurakumugiganexiwir.pdfIn PDF document text
    • http://vietnamwarart.com/uploads/1/3/0/5/130590622/fidizivagili_fejumevu.pdfIn PDF document text
    • http://worldentertmex.com/uploads/1/3/0/2/130271102/mixukugixap.pdfIn PDF document text
    • http://travelingnancy.org/uploads/1/3/0/4/130483499/18d363977c5.pdfIn PDF document text
    • http://rollfastranchwear.com/uploads/1/3/1/3/131379326/dorotilu.pdfIn PDF document text
    • http://ros-io.com/uploads/1/3/0/4/130477363/gazate-xugozil.pdfIn PDF document text
    • http://normworth1startist.com/uploads/1/3/0/6/130605497/fivomerikedud_nawixu_kedes.pdfIn PDF document text
    • http://tuknikgs.com/uploads/1/3/0/7/130739393/f8b13a7284.pdfIn PDF document text
    • http://swimaquatic.com/uploads/1/3/1/3/131398385/sijawowu_fifonutu.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2E 8468 bytes
SHA-256: f16bfe3dc2641ed405973e3b86d7c1a5f2a80bea138b4ad5c5b17c0e2269f07f