Malicious PDF — malware analysis report

Static analysis result for SHA-256 f822119854f8d596…

MALICIOUS

PDF

39.8 KB Created: 2020-03-09 05:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1d5b0f9e5e922e6a77ab16abaff7d6aa SHA-1: 3d3c91f67049aee3915c3e5cb88e3184958b845d SHA-256: f822119854f8d596a59cb5517e7cc6df2071661bb0d0d3e117df59997c2b9b63
94 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external links to other PDF files. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to these external resources, which likely serve as a distribution point for further malware or phishing content. The document body contains a lure related to 'Ikea kitchen units ebay', suggesting a deceptive tactic to attract clicks.

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://qzb12.brdge.org/uploads/1/3/0/3/130313784/130313784.html#ikea+kitchen+units+ebay
    • http://tungemmy.store/uploads/1/3/0/7/130740207/zapaluxatujil.pdf
    • http://rab-verzoek.club/uploads/1/3/0/5/130590700/gilavelotu.pdf
    • http://adsl-65-71-85-50.lawsnakard.com/uploads/1/3/0/6/130620450/480b1f3d9aa1e66.pdf
    • http://redmaplecelpipedu.com/uploads/1/3/0/5/130551137/pimek_gofejodanoxur_xodafubekiped.pdf
    • http://elodiecrowley.com/uploads/1/3/0/7/130775085/9183c3.pdf
    • http://guildaware.net/uploads/1/3/0/6/130639751/zemopik.pdf
    • http://streetdancenow.com/uploads/1/3/0/4/130476101/2ed5930f8.pdf
    • http://musikbonerecords.com/uploads/1/3/0/6/130620945/takifed-ralaboz.pdf
    • http://www.yourhealthpilates.com/uploads/1/3/0/2/130287419/madoro.pdf
    • http://techbitdaily.com/uploads/1/3/0/2/130272848/47b81a7a09bac4b.pdf
    • http://www.sendsupportsussex.com/uploads/1/3/0/4/130477541/4001036.pdf
    • http://netspeedsolutions.com/uploads/1/3/0/7/130740082/0d93d115c2.pdf
    • http://heythatsprettyneat.com/uploads/1/3/0/4/130477605/f1a7b.pdf
    • http://www.blendncontractor.com/uploads/1/3/0/5/130551534/judalepatopobuv.pdf
    • http://ilikeysmikeysbbq.com/uploads/1/3/0/7/130740371/5459696.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_off00007169.bin
8de37cfa1f0971bd28cd68f11f50e76b78779c471fd1e5e30adc6fedb8916532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7169 8512 bytes

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