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)
MD5: 8ce03e98fa851dbd75e0c4533a4d78f6 SHA-1: 5da205344048e1654b179963177be049425e5577 SHA-256: 7e06b28fb9f4de0922d4110a12f3c58029c01562c1f8024a2227ed15443a0259
136 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. This suggests the document's primary purpose is to redirect users to other sites, potentially for SEO manipulation or to host malicious payloads. The presence of a "Password-protected archive handoff" heuristic indicates that the document may be part of a multi-stage attack, where the user is instructed to decrypt an archive. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
    • http://trinitymorrison.com/uploads/1/3/1/3/131398242/ruvigibubiwi-daroxanevokud-momagujurol.pdf
    • http://handmadedogbeds.com/uploads/1/3/0/7/130738550/8866574.pdf
    • http://united-support-agents.com/uploads/1/3/0/8/130874585/mazagos.pdf
    • http://novana.org/uploads/1/3/0/7/130775362/3972972.pdf
    • http://mimimadeitjs.com/uploads/1/3/0/2/130272328/8185390.pdf
    • http://giersberg.at/uploads/1/3/0/7/130739764/nurakumugiganexiwir.pdf
    • http://vietnamwarart.com/uploads/1/3/0/5/130590622/fidizivagili_fejumevu.pdf
    • http://worldentertmex.com/uploads/1/3/0/2/130271102/mixukugixap.pdf
    • http://travelingnancy.org/uploads/1/3/0/4/130483499/18d363977c5.pdf
    • http://rollfastranchwear.com/uploads/1/3/1/3/131379326/dorotilu.pdf
    • http://ros-io.com/uploads/1/3/0/4/130477363/gazate-xugozil.pdf
    • http://normworth1startist.com/uploads/1/3/0/6/130605497/fivomerikedud_nawixu_kedes.pdf
    • http://tuknikgs.com/uploads/1/3/0/7/130739393/f8b13a7284.pdf
    • http://swimaquatic.com/uploads/1/3/1/3/131398385/sijawowu_fifonutu.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_off00009b2e.bin
f16bfe3dc2641ed405973e3b86d7c1a5f2a80bea138b4ad5c5b17c0e2269f07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2E 8468 bytes

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