Malicious PDF — malware analysis report

Static analysis result for SHA-256 d852274185810ed5…

MALICIOUS

PDF

34.8 KB Created: 2020-05-15 02:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d15fdaef0d41b7dd592ecd18b371e620 SHA-1: 7703a467538d0339dfe063f736c0dc8cc6cdb8a4 SHA-256: d852274185810ed5bbab09334ca2e5439a87dc62a63c7c85d53d2e2518ce35a1
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common technique for distributing malware. The heuristic 'Pdf.Dropper.Agent-8268389-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs likely serve as a mechanism to download and execute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8268389-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8268389-0
  • 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://burracing.com/uploads/1/3/0/2/130288401/130288401.html#v60+respironics+service+manual
    • http://realisticmaw.com/uploads/1/3/0/6/130603760/3074738.pdf
    • http://logoff.life/uploads/1/3/0/7/130776452/4603196.pdf
    • http://lorrainemeyer.com/uploads/1/3/1/4/131453062/1893656.pdf
    • http://brushpopperaviation.com/uploads/1/3/0/4/130488833/dirovuloda_jumevu.pdf
    • http://thesprinkledcompany.com/uploads/1/3/0/2/130287942/5725576.pdf
    • http://backshops.host/uploads/1/3/0/5/130550714/740548.pdf
    • http://mymindfulconnections.com/uploads/1/3/0/6/130621850/1509739.pdf
    • http://johnnycabinets.com/uploads/1/3/0/2/130272573/8172973.pdf
    • http://heritageestatesalesstl.com/uploads/1/3/0/6/130603798/6960b9d9c6b0.pdf
    • http://ashleylania.com/uploads/1/3/0/4/130436136/53f7ab.pdf
    • http://storybookskies.org/uploads/1/3/1/8/131856937/20b5b11c745b855.pdf
    • http://integroep.com/uploads/1/3/0/5/130589309/4635331.pdf
    • http://thevenueonemain.com/uploads/1/3/1/3/131379255/5907285.pdf
    • http://isotherme.eu/uploads/1/3/0/2/130289549/jepeboduw.pdf
    • http://sparklepalacekidsspa.org/uploads/1/3/1/6/131637928/2991768.pdf
    • http://p-airms.com/uploads/1/3/0/4/130435518/1784145.pdf
    • http://lopery.com/uploads/1/3/0/6/130604653/zagowatolijuz.pdf
    • http://foxycopy.be/uploads/1/3/1/6/131606128/zizewi.pdf
    • http://azulmusicstore.com/uploads/1/3/0/7/130739261/jedaxufo.pdf
    • http://photoland.ca/uploads/1/3/0/2/130272600/5ed285a96c2dda5.pdf
    • http://vickigrospe.com/uploads/1/3/0/6/130604281/33898e4e49d.pdf
    • http://jaspersdealership.com/uploads/1/3/1/1/131164564/ginarepesef.pdf
    • http://sflalaguna.com/uploads/1/3/0/5/130540293/9460804.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_off00005d8b.bin
853d6374407a17b6d28b3ab47b26bf0d2d03e89887659d073ed1f2e80f7da73a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 9764 bytes

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