Malicious PDF — malware analysis report

Static analysis result for SHA-256 1688ed97b54c2db9…

MALICIOUS

PDF

37.7 KB Created: 2020-03-12 14:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f0a37e71de3b0581339caf6ae4fdfc50 SHA-1: 7749d621098a275b6b3fa51e5386c555d7e31718 SHA-256: 1688ed97b54c2db9df2e30436739a1906895bc110ac22cb3b0c7ba08af50a543
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is disguised as a printer manual but contains a large number of external links, indicating a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links to external PDF files suggests an attempt to direct users to potentially malicious content or to manipulate search engine results.

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://gwbtmh.bdgct.com/uploads/1/3/0/3/130323415/130323415.html#mettler+toledo+8807+printer+manual
    • http://jahservicios.es/uploads/1/3/0/6/130604397/972043f.pdf
    • http://pantsbysamstore.com/uploads/1/3/0/7/130776503/togemabuku.pdf
    • http://secretdiaryofanycgirl.com/uploads/1/3/0/2/130270889/lesenepuvifirolerolo.pdf
    • http://pagangarden.com/uploads/1/3/0/5/130543134/pupibewaje-tokijalewoso-garugoridirase-mazesonibe.pdf
    • http://phelpscountyhumanesociety.org/uploads/1/3/0/6/130620970/deed1f.pdf
    • http://goss-p.com/uploads/1/3/0/4/130477252/nujotigufajorurafe.pdf
    • http://kanicayadav.com/uploads/1/3/0/6/130605237/6041697.pdf
    • http://redraygun.com/uploads/1/3/0/3/130379146/sakipun.pdf
    • http://gt-autos.com/uploads/1/3/0/7/130740112/5225502.pdf
    • http://spirituallyyou.life/uploads/1/3/0/4/130490410/jifinot.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_off00006af8.bin
635910302fb60ca5a15cea0a5999b8d4d6c11ad635c3196f0a932ef04afdca79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF8 7460 bytes

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