Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2766ea4ce7c3143…

MALICIOUS

PDF

44.6 KB Created: 2020-03-29 12:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16ec2ae0d37bd7ccf1e8ded0400bd908 SHA-1: e87b24145e3e94595491ab07744b736739d02c42 SHA-256: d2766ea4ce7c314367868cf08a74bab6ea05769896eeb4d693c367ee2d98134c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous embedded links to external websites, a common tactic for link farm or phishing campaigns. The document body, though partially obfuscated, includes a URL that matches one of the extracted external links, suggesting a deliberate attempt to redirect the user. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent, likely for malware distribution or credential harvesting.

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://74-123-77-221.mgwnet.com/uploads/1/3/0/6/130605509/130605509.html#como+activar+las+chakras+del+cuerpo
    • http://championsworship.org/uploads/1/3/0/8/130874570/f96fd0.pdf
    • http://pixiedust-designs.com/uploads/1/3/0/9/130969284/gosisivupoxij.pdf
    • http://gooebuttercakes.com/uploads/1/3/0/6/130639212/pewamaxegunava-jilabogena-kukuf.pdf
    • http://stainlessinnovations.us/uploads/1/3/1/1/131164205/3298902.pdf
    • http://anulekhasingh.com/uploads/1/3/0/5/130539928/jukikuvekepenefox.pdf
    • http://deitzlandsurveying.com/uploads/1/3/0/6/130620521/38b18b25a450eb.pdf
    • http://boxed-by-baisy.com/uploads/1/3/0/4/130476013/1834823.pdf
    • http://drrosechildcentredcounselling.com/uploads/1/3/0/4/130488513/sawexasulugom.pdf
    • http://vpshoaihuongdancers.com/uploads/1/3/0/5/130551103/tafukev.pdf
    • http://reynoldscopyediting.com/uploads/1/3/1/4/131437025/lagewi.pdf
    • http://siteowner.net/uploads/1/3/1/3/131380707/togipazat_kamevero.pdf
    • http://mendaxora.com/uploads/1/3/0/2/130271142/tudulafetofekewe.pdf
    • http://ahavah.net/uploads/1/3/0/7/130739121/1276613.pdf
    • http://mcbespoke.com/uploads/1/3/0/4/130435516/9288378.pdf
    • http://comehereonce.com/uploads/1/3/0/9/130969143/doviriv-rukabozidemak-kukepose.pdf
    • http://cbdsnacks.me/uploads/1/3/0/4/130483833/sameneja.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_off00008491.bin
eaa13624e7964241b6d17878a01991de6236086b2ada673b87e48b293296363b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8491 8516 bytes

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