Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eccdc6fdd63e121…

MALICIOUS

PDF

36.7 KB Created: 2020-04-29 05:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a43a01766f7f06ec7837d4c23b00435 SHA-1: 8a6c093bbc77810fe725d8b020812746e09d8f95 SHA-256: 1eccdc6fdd63e1210b1ce9c9b106236209fac001f72c4346ffc1851ba12575ec
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'Characteristics of transformational leadership quizlet' and references 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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://heavensentlawnmanicurist.net/uploads/1/3/0/2/130270934/130270934.html#characteristics+of+transformational+leadership+quizlet
    • http://dvisions.org/uploads/1/3/0/3/130379113/7616441.pdf
    • http://nativeoutlet.net/uploads/1/3/0/6/130639400/kuvegi.pdf
    • http://roark-redwood.com/uploads/1/3/0/7/130775247/kubosa_pufemijobuzopak.pdf
    • http://msgolfforeacure.com/uploads/1/3/0/2/130291874/9436646.pdf
    • http://swellconnected.com/uploads/1/3/0/4/130436125/6545963.pdf
    • http://teganpoo.com/uploads/1/3/0/4/130489499/5285385.pdf
    • http://manosportswear.com/uploads/1/3/0/5/130543684/9438097.pdf
    • http://rexusconsulting.com/uploads/1/3/1/3/131379085/pisol_fiwiseresozexo_fajalupa_ranuxokegime.pdf
    • http://mta-sts.wkfinancieeladvies.nl/uploads/1/3/0/2/130289702/ecd28a359e11c7.pdf
    • http://eatfyb.com/uploads/1/3/1/4/131453255/wadosojusofago.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_off000068fd.bin
ea20563b9191f725b32065bd8795d45cde4a7f145121042bbe9cf440d6016572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 6916 bytes

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