Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80e8153b1ad8cb0…

MALICIOUS

PDF

45.6 KB Created: 2020-06-17 09:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ba4bd0efca844259985ada3c84247e SHA-1: f32b87406fd254d212ec3e4357478f6005b7a1a9 SHA-256: b80e8153b1ad8cb086529a9a2e23c573cb854ae029e363f28c72c16c5cca358b
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious. The embedded URL `http://4kj.undesirable.us/uploads/1/3/0/8/130874490/130874490.html#digidoor+ii+installation+manual+download` further supports the lure of a fake manual download. No scripts were extracted from this sample.

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://4kj.undesirable.us/uploads/1/3/0/8/130874490/130874490.html#digidoor+ii+installation+manual+download
    • http://webdisk.atomant.com.au/uploads/1/3/1/4/131438758/mebawafuxipobawes.pdf
    • http://house-of-furniture.net/uploads/1/3/0/4/130483153/86b980.pdf
    • http://landuseplus.com/uploads/1/3/0/5/130589345/jilawapujovovulir.pdf
    • http://pastorgenevieve.com/uploads/1/3/0/5/130543600/9990151.pdf
    • http://thetribespace.com/uploads/1/3/0/5/130551186/bofoto.pdf
    • http://74-123-78-212.mgwnet.com/uploads/1/3/0/5/130539373/zepazakutuzitum.pdf
    • http://at-bikes.dk/uploads/1/3/1/1/131164497/zadoxa-rugujexigebel-sexepizifulesin.pdf
    • http://landuseplus.com/uploads/1/3/0/5/130589345/jilawapujovovulir.pd
    • 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_off000075b4.bin
1a18c8d6ba42ab5eee79724abf3199d5ba9149349d1bf80cb00a55af136c7430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B4 5000 bytes
font_01_sfnt_off000086a3.bin
90c8f44d97217ed0332ad5de5c9ae7b3b86a9128d39c58602c976fa0c9a4dc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 10520 bytes

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