Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e21be5060b05fcf…

MALICIOUS

PDF

48.0 KB Created: 2020-04-20 14:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3230dfeb9a304dd2a94f01f04ad009dd SHA-1: 1d9e293b36e69f885aed52361a6a5ff429fd5d49 SHA-256: 4e21be5060b05fcfd41344c34d9ca544bb3bd49eaf7191f91a9397f24853b0b9
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body mentions 'Breatheology book pdf', suggesting a lure to a potentially malicious website. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://developtransformimprove.com/uploads/1/3/0/8/130873855/130873855.html#breatheology+book+pdf
    • http://erikaduffyadventures.com/uploads/1/3/0/2/130271078/7180389664a7e.pdf
    • http://psychosemantics.net/uploads/1/3/0/5/130588261/xawagidu-temovafovomeru-pufafusa.pdf
    • http://xtremefearclub.org/uploads/1/3/0/5/130588590/lenikozakafaf.pdf
    • http://smoothtransitionservices.com/uploads/1/3/0/7/130775241/9953054.pdf
    • http://constructionfurniture.com/uploads/1/3/0/8/130873992/8056054.pdf
    • http://deltwaco.com/uploads/1/3/1/4/131453049/fenel_lekawexajo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006202.bin
7ada3ef9b5a7ebf07b90a84d7d81476b06882f3a17be80ae9ebc8ad64677ed7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 8868 bytes
font_01_sfnt_off000083aa.bin
625da8379299302994a05deb296ec131bc71fab22ad6b807c74d2a33d9bdb1c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 15372 bytes

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