Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb42865321ec6f2…

MALICIOUS

PDF

52.5 KB Created: 2020-03-07 18:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 73927108fd9f73b7279e943850d2e72c SHA-1: 8e8a5cb46d60c92d11b29bc35e8c8bd04d1bbf37 SHA-256: 6eb42865321ec6f20e5b80890ceef574214a93c4349286992ad5a253e2ce84d0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests a link farm or content distribution network. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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://cyclebavaria.com/uploads/1/3/0/5/130588960/130588960.html#adobe+pro+create+fillable+form
    • http://beckandclem.com/uploads/1/3/0/5/130589316/regep.pdf
    • http://helrae.com/uploads/1/3/0/5/130539139/juwutipojixoxa.pdf
    • http://nathanrpt.com/uploads/1/3/0/4/130476943/0e5434bd8ed087.pdf
    • http://dcterrorisminsurance.com/uploads/1/3/0/5/130543640/voloj.pdf
    • http://naruebordin.com/uploads/1/3/0/5/130551137/2206698.pdf
    • http://www.cleokrejci.com/uploads/1/3/0/8/130813320/2509287.pdf
    • http://baconsmilesministry.com/uploads/1/3/0/7/130776245/16f9af302b4.pdf
    • http://www.genevasoapcompany.com/uploads/1/3/0/9/130969403/04e16784a254c33.pdf
    • http://blueegg.net/uploads/1/3/0/5/130540585/5e649afcdccc.pdf
    • http://tracys-styling-salon.com/uploads/1/3/0/5/130551219/460efb461ffe0.pdf
    • http://literaturepsychology.com/uploads/1/3/0/5/130588573/566d17.pdf
    • http://diversityforpresident.com/uploads/1/3/0/3/130312950/lunuxefapozokodep.pdf
    • http://vinjuntruckingltd.com/uploads/1/3/0/7/130775612/radojixipigaru.pdf
    • http://mta-sts.mx.tysonscorners.net/uploads/1/3/0/3/130379398/b928bad3e315952.pdf
    • http://virginiedelaby.com/uploads/1/3/0/4/130476083/duzelodemo.pdf
    • http://skopelosart.com/uploads/1/3/0/5/130590366/bb51acbbc656.pdf
    • http://rockthecatspa.biz/uploads/1/3/0/7/130775119/rikebazolezena.pdf
    • http://insidecampuscorner.net/uploads/1/3/0/6/130639549/pejokadezagope_subofitera.pdf
    • http://organicdirt.net/uploads/1/3/0/7/130740046/taxiloruwesi.pdf
    • http://boatandbiketourstogo.net/uploads/1/3/0/4/130476493/9457314.pdf
    • http://mylifeinconchas.com/uploads/1/3/0/6/130621216/3953539.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_off0000a656.bin
57b3402387d6d38952a8136c382ee1629ad8f61b7cb998f4ebd5b543e9a352e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA656 7656 bytes

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