Malicious PDF — malware analysis report

Static analysis result for SHA-256 8621676e27336737…

MALICIOUS

PDF

35.5 KB Created: 2020-05-23 10:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8fefda832f599763c9f1875491b5d5 SHA-1: 302041643c86fa1a7b23e3efed23b2cda47132d4 SHA-256: 8621676e2733673739f5628afc60054270f52335980d255f577c2e6f8270010c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, also contains URLs pointing to external domains. These findings suggest the primary purpose is to redirect users to a network of websites, likely for SEO manipulation or to serve malicious content. No scripts were extracted, but the extensive linking behavior is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jameshotelandapartments.devsite-1.com/uploads/1/3/0/3/130379611/130379611.html#best+park+in+the+universe+apk+free+d
    • http://northidahoreview.com/uploads/1/3/0/2/130270843/6464401.pdf
    • http://livingthecrownlife.com/uploads/1/3/0/6/130604069/mavigevupozis.pdf
    • http://leighlennon.com/uploads/1/3/0/7/130738550/godobatuv.pdf
    • http://goldstoneestate.com/uploads/1/3/0/2/130273753/9921917.pdf
    • http://sksimportexport.com/uploads/1/3/0/7/130776585/kofaju.pdf
    • http://deathbyyarn.us/uploads/1/3/1/6/131606782/47e987f843.pdf
    • http://rlllaw.com/uploads/1/3/0/9/130969645/nogejekuwo_kujetek.pdf
    • http://itsqueenharper.com/uploads/1/3/0/5/130538941/xomuzumokedarafeko.pdf
    • http://rpgiq.org/uploads/1/3/0/4/130477192/b382911d5c28.pdf
    • http://brookesummers.blog/uploads/1/3/0/5/130550693/755961.pdf
    • http://ivan-molloy.com/uploads/1/3/0/4/130483457/47456ce6d.pdf
    • http://bsassyboutique.com/uploads/1/3/0/2/130289235/d9f723b.pdf
    • http://3577productions.com/uploads/1/3/0/5/130544131/gapogifeb.pdf
    • http://helidesign.ca/uploads/1/3/0/2/130288579/kisisuvajumexur-mosuragosud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005daf.bin
b4ab2b95047fa9abb2d8ae7b04db5bc8889f5b646abb34919347f42e926a7a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 10876 bytes

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