Malicious PDF — malware analysis report

Static analysis result for SHA-256 64994e9b1f8dfc41…

MALICIOUS

PDF

44.9 KB Created: 2020-03-13 06:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f63284b757211b139f4ce4ac6d59bb15 SHA-1: 1a6d345cecc1be59a3e7f3ea78d6c5b932317513 SHA-256: 64994e9b1f8dfc4169d4bf58b4e7877a87e2437cb0cc0147f3b92b2bf2bf1ebc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting a deceptive or manipulative purpose. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also listed in the heuristics, reinforcing the link farm attack pattern.

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://74-123-75-164.mgwnet.com/uploads/1/3/0/3/130313006/130313006.html#fmea+aiag+vda+release+date
    • http://paydaylendinginvestigation.com/uploads/1/3/0/3/130379285/ginabamubaxexugutizu.pdf
    • http://www.icybbkollection.com/uploads/1/3/0/5/130542912/7475378.pdf
    • http://horncomb.com/uploads/1/3/0/7/130776781/f701362ad.pdf
    • http://ffanimalfoundation.org/uploads/1/3/0/7/130738814/parexug.pdf
    • http://scalarealef1.com/uploads/1/3/0/2/130289406/salupubilet.pdf
    • http://www.nordicwarriortraining.com/uploads/1/3/0/4/130477048/224ef0c3e772e.pdf
    • http://lopan.net/uploads/1/3/0/4/130476085/72afed43aced.pdf
    • http://www.changeofpaceruncoaching.com/uploads/1/3/0/5/130542780/6198274.pdf
    • http://gwbmusic.com/uploads/1/3/0/7/130740222/dcd6371aa97df6.pdf
    • http://alessandramotterle.com/uploads/1/3/0/8/130814247/91a6669.pdf
    • http://sandsx2.com/uploads/1/3/0/5/130551661/towewusetulexekojo.pdf
    • http://www.bostoncrimetours.com/uploads/1/3/0/7/130740607/dinivumorinisan_kijidaguj_jekagajolan_tejamupeve.pdf
    • http://www.luswt.co.uk/uploads/1/3/0/7/130739275/8bb5fe7.pdf
    • http://www.jamahiriyamovement.com/uploads/1/3/0/7/130739864/671692a0573.pdf
    • http://survive2life.com/uploads/1/3/0/7/130776791/3548340.pdf
    • http://www.angielskawioska.com/uploads/1/3/0/6/130621214/7a6baa.pdf
    • http://blackpeopledrinkcoffee.com/uploads/1/3/0/7/130739595/ligiv.pdf
    • http://jinduqipaiyouxi.br3h.com/uploads/1/3/0/6/130639948/8831adf75a.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_off000084ed.bin
16eb95b9795b285abf8af61ca22f13fa751e7e1fa0e50335b39bd117ddb064a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84ED 8788 bytes

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