Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3286cc1634e6bd…

MALICIOUS

PDF

46.7 KB Created: 2020-04-11 11:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c274ebcc1c91adf553866c7386520c1e SHA-1: 851a7492cbee21ecbb1690d83a456c85cf896997 SHA-256: 3d3286cc1634e6bda9ce68efcb369ab4979b77396954f53977d306f46e2cab20
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file contains a large number of external links, many of which are dynamically generated and point to unrelated content, indicating a link farm or SEO spam tactic. The document body, though heavily corrupted, contains text related to 'Astral projection' and the authoring application 'wkhtmltopdf', suggesting a lure to potentially malicious or unwanted content hosted on the numerous external domains. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://photolenka.com/uploads/1/3/1/4/131406663/131406663.html#astral+projection+step+by+step+guide
    • http://lakeviewhi.com/uploads/1/3/0/5/130546096/somunov-moves.pdf
    • http://coeventuresinc.com/uploads/1/3/0/6/130605036/9405764.pdf
    • http://fionaheartthekitchenshepherd.com/uploads/1/3/1/4/131454286/de968248d1578.pdf
    • http://originaldoanfirestarter.com/uploads/1/3/0/9/130969683/jarevibuv-ligaxuwewaleje-palepubego.pdf
    • http://petalies.com/uploads/1/3/1/3/131381802/kogepawuxo.pdf
    • http://susanturnerhealth.com/uploads/1/3/1/4/131453402/mixosud.pdf
    • http://rebeccasmithphotography.org/uploads/1/3/1/4/131438448/bafuvogovasibe_zusodowoj_dusagudi_lufof.pdf
    • http://fjlclothesaccessories.com/uploads/1/3/0/3/130313196/38573ac52fe.pdf
    • http://smartdevelopmentgrp.com/uploads/1/3/0/8/130874205/tijidipibeka.pdf
    • http://met-wilderwood.com/uploads/1/3/0/2/130270912/b2b2e4482a0bdc.pdf
    • http://brielius.com/uploads/1/3/0/4/130435589/2756139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e9d.bin
890b7c433e2238e145746c5598eebb1a1f16570b431e209460ec2413ac197b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 8072 bytes
font_01_sfnt_off00008de6.bin
3d48a4a0171bc8984a9d002c5b63de59358ba63bf648af7a75746ee17eec0d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 2192 bytes
font_02_sfnt_off000097fd.bin
b63ec7160036b1a427c70edb4e2dae4fecc64afc162aee8575e71397b91733d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FD 16368 bytes

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