Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9033c1065fcfc75…

MALICIOUS

PDF

55.4 KB Created: 2020-06-02 09:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc3ee75178fb990d050559179f416a7 SHA-1: e34623b7f25cbf2777562b6baa39475330896e3e SHA-256: a9033c1065fcfc757be0a0ac58bb0d779d21806dc88f46bf9f829139fdb8f955
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body, though heavily obfuscated, contains references to 'Windows server 2012 r2' and a URL that appears to be part of an SEO link farm. The presence of numerous external links suggests a watering hole attack or a mechanism to distribute further malicious content.

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://cafedenoces.com/uploads/1/3/1/0/131070381/131070381.html#windows+server+2012+r2+inside+out+co
    • http://maryleay.com/uploads/1/3/1/4/131437434/4474174.pdf
    • http://egmonthorsecoaches.com/uploads/1/3/0/7/130738731/74ec4fbc19f073.pdf
    • http://peterwyngaard.com/uploads/1/3/0/2/130270982/9ad6a.pdf
    • http://cafedenoces.com/uploads/1/3/1/0/131070381/terms.html
    • http://cafedenoces.com/uploads/1/3/1/0/131070381/dmca.html
    • http://cafedenoces.com/uploads/1/3/1/0/131070381/policy.html
    • https://panupobeguki443392900.files.wordpress.com/2020/05/99767248732.pdf
    • https://boduwifa.files.wordpress.com/2020/05/40944886063.pdf
    • https://marupuk.files.wordpress.com/2020/05/futavik.pdf
    • https://sisukone.files.wordpress.com/2020/05/24346067129.pdf
    • https://godumuji.files.wordpress.com/2020/05/wamegemerolosemedesem.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_off0000abb7.bin
730035416f1728ffed32ff1629ea3c3697434d3ef9571b199d1efb9f2955c43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB7 11268 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.