Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c1621e289cd521…

MALICIOUS

PDF

27.8 KB Created: 2020-05-31 22:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 320a51014b364f433956aee7b46feaa7 SHA-1: a7377959f846b1718e86de795b34be06bdcd4b32 SHA-256: c2c1621e289cd52136cb4cd1c91ef8fcbaa12ff1c4f4ebbfc45ede7a89bf0b79
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to create link farms for SEO manipulation or to host malicious content. The document body, though partially corrupted, suggests a lure related to a 'John Deere 450 dozer service manual'. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple unknown URLs strongly indicate a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://lukecharlesonmusic.com/uploads/1/3/1/6/131637928/131637928.html#john+deere+450+dozer+service+manual+pdf
    • http://rawaqmedia.com/uploads/1/3/0/9/130969341/gejowazajasibodatofu.pdf
    • http://c-fam.com/uploads/1/3/0/6/130639896/sojeninugajoliwofon.pdf
    • http://brushandbow.info/uploads/1/3/0/6/130604575/e31899f15758.pdf
    • https://zafevilak.files.wordpress.com/2020/05/xobedimez.pdf
    • https://derafomiwu.files.wordpress.com/2020/05/kovozuparuvajex.pdf
    • https://jogadol.files.wordpress.com/2020/05/63784401317.pdf
    • https://zakudapure.files.wordpress.com/2020/05/83494093925.pdf
    • https://suwopuserera.files.wordpress.com/2020/05/31273666704.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_off0000443a.bin
6b05f11253f6ba8c21a0b11d3648432362dc874fafccc8fd0098f3e83bc4147e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x443A 9380 bytes

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