Malicious PDF — malware analysis report

Static analysis result for SHA-256 68145c3f356a7bba…

MALICIOUS

PDF

30.0 KB Created: 2020-04-17 10:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 05a09de8240766e363dd36806c4bca64 SHA-1: 9ce5136d77524b2268355609971420411d63e8ce SHA-256: 68145c3f356a7bbadd1e0b8561bc6713e14deb2cd2be49400423a79b746c7b7e
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which are likely intended to redirect users to malicious websites or phishing pages. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to mimic product listings. The ML classifier strongly indicates maliciousness, supporting the assessment of a phishing or redirection attack.

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://bougeebox.com/uploads/1/3/0/7/130776040/130776040.html#amazon+uk+brushed+cotton+sheets
    • http://lakemba-foundation.org/uploads/1/3/0/7/130740623/39a7e0f4.pdf
    • http://langfinder.com/uploads/1/3/0/6/130604826/tebaxewuves_benuk.pdf
    • http://urbanwarriorgames.com/uploads/1/3/0/2/130287317/zesakevawox.pdf
    • http://ericsinc.com/uploads/1/3/0/7/130775443/fijuwexor-rozorolofozalep-pidolena.pdf
    • http://arbelabeauty.com/uploads/1/3/0/7/130739156/4927450.pdf
    • http://bramblebooks.org/uploads/1/3/0/6/130620759/xenuvixu.pdf
    • http://cowaybyzain.com/uploads/1/3/0/4/130488580/6256629.pdf
    • http://thecapehomerepair.com/uploads/1/3/0/7/130738991/fitidudadositikik.pdf
    • http://myhilocollection.com/uploads/1/3/1/4/131453024/vupob.pdf
    • http://berlenllc.com/uploads/1/3/0/4/130483249/dadagud.pdf
    • http://justonekid.org/uploads/1/3/0/3/130379164/wunudozolobew.pdf
    • http://focustransformation.ca/uploads/1/3/0/5/130551457/sodirutolegurege.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_off00004d44.bin
3e61db39599912d970519d757472000aa70ef14e7fa436f62c90dc0a4aacebdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D44 7472 bytes

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