Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d5409ce9d10690…

MALICIOUS

PDF

30.8 KB Created: 2020-04-06 09:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d638a15715482985a0485f7ee0db9d55 SHA-1: 857edaa6611e544c6cdad5e7f81e54dd319095a2 SHA-256: 66d5409ce9d106900b07b3377c1d47c18278859089c10eb2ea447e384e6ee3a9
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to manipulate search engine results or direct users to malicious content. While no scripts were directly extracted, the presence of numerous external links suggests a phishing or content-luring attack vector, likely initiated via spearphishing attachment.

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://sustainablefleet.com/uploads/1/3/0/6/130639197/130639197.html#kenneth+cole+a126-11+watch
    • http://soignefurnishings.com/uploads/1/3/1/3/131380916/pugixuka-zebagurokar-morapokixiva-fijaxorilab.pdf
    • http://jrnewsphotography.com/uploads/1/3/0/5/130538922/mevifuxor.pdf
    • http://www.lakeandplain.com/uploads/1/3/0/2/130287936/1531312.pdf
    • http://wrelo.com/uploads/1/3/0/7/130738940/7aa7037.pdf
    • http://galaxyfoodsinc.com/uploads/1/3/0/6/130604935/mekoxakusitugi-ladiwexif.pdf
    • http://mountaincreekskiresortnj.com/uploads/1/3/0/2/130287547/bejiralulajumadu.pdf
    • http://constelacaofamiliar.net/uploads/1/3/1/3/131398054/tonilobopovefom_xilipek.pdf
    • http://lorislibrary.org/uploads/1/3/0/7/130776421/rerepono.pdf
    • http://pgsofficial.com/uploads/1/3/0/5/130551294/xekikorij_fewunogesa.pdf
    • http://geppettoproject.com/uploads/1/3/1/3/131381044/bodowemugati.pdf
    • http://seslab.dss.ucdavis.edu/uploads/1/3/0/7/130740389/zikiben.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_off000052c9.bin
b59f9a1c7fbe802f088333eb0f2ec46addea1a80b757c83c50d9bf25d0fee195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C9 7084 bytes

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