Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcb43ecc47bd7bd…

MALICIOUS

PDF

34.5 KB Created: 2020-04-06 11:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8c46592c6851269cd25598875d298b77 SHA-1: 12dfd1b402159ee771c2a158a49725f14dd8a048 SHA-256: 6dcb43ecc47bd7bd19e75e4d4e6dec91093602cd49e2256aaae7e0ebcb998759
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests a potential for redirecting users to harmful sites. No scripts were extracted, but the PDF structure itself is indicative of a malicious intent to drive traffic to external resources.

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://globalfineantique.com/uploads/1/3/0/2/130292148/130292148.html#casio+g+shock+gw7900-1
    • http://arrbusinesssolutions.com/uploads/1/3/0/9/130969813/patizufofoxoxig-gubazoxidegin-xubewikonikevan-wubosixepepezu.pdf
    • http://fabridisplay.com/uploads/1/3/1/0/131070874/8ab8ffd3fc38.pdf
    • http://elliottandjeff.com/uploads/1/3/0/5/130545173/risufawopek.pdf
    • http://balticholidays.net/uploads/1/3/1/1/131164112/kofidis-binalimanubo-negitu.pdf
    • http://rosiesweddingplanner.com/uploads/1/3/0/7/130738499/xepamikepaseme.pdf
    • http://evafrontierdays.com/uploads/1/3/1/0/131070888/322741.pdf
    • http://charlesjrobinson.com/uploads/1/3/0/6/130604031/pojedu-telogesusafa-momosuneluxovuz-guwajavif.pdf
    • http://neonatalcoreoutcomeset.org/uploads/1/3/1/3/131381533/92ada2.pdf
    • http://mysunshinelifestyle.com/uploads/1/3/0/6/130639540/9315482.pdf
    • http://dmtraining.net/uploads/1/3/0/6/130604770/raror-jatadota-walivizi.pdf
    • http://davidhdeals.net/uploads/1/3/0/6/130621305/c87e50.pdf
    • http://artisantailleur.quebec/uploads/1/3/0/6/130620637/3198444.pdf
    • http://josephewondejr.com/uploads/1/3/0/3/130313022/zusigofip.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_off00005e13.bin
65c52724d470475e9ffe6fd941dcbd899d5f25ec181d423c86604d1efdc3c9f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 8028 bytes

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