Malicious PDF — malware analysis report

Static analysis result for SHA-256 2579100a5b3a8deb…

MALICIOUS

PDF

45.6 KB Created: 2020-05-09 21:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 215e51377df487c0e4e9297a42f3a3c2 SHA-1: 59f9e52d75fb759abc761057acf92f1e269a12a0 SHA-256: 2579100a5b3a8deba248ac6800b1c6d9be4ec0b5bdb2c1c2aa90be0b76631150
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample, limiting the ability to determine specific execution behaviors.

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://winstonconnects.com/uploads/1/3/0/5/130539990/130539990.html#cylindrical+snap+fit+design+guide
    • http://seven20shop.com/uploads/1/3/0/6/130621013/1c5c1ea12e.pdf
    • http://jobirch.com/uploads/1/3/0/9/130968961/275c08d.pdf
    • http://viqueenofficial.com/uploads/1/3/0/7/130775744/8277109.pdf
    • http://hardshiphome.org/uploads/1/3/1/3/131379026/kozapep.pdf
    • http://footballfanatics247.com/uploads/1/3/0/9/130969896/liboraxidutolubazav.pdf
    • http://planet216.org/uploads/1/3/0/9/130969934/xusitipewi.pdf
    • http://mindfulofjiujitsu.com/uploads/1/3/0/6/130620594/6354236.pdf
    • http://friendsofmaurinefbailey.org/uploads/1/3/0/2/130270934/8025194.pdf
    • http://katie-louweddings.com/uploads/1/3/0/6/130620532/a03a295.pdf
    • http://sm-eb.de/uploads/1/3/1/8/131858043/206cb700.pdf
    • http://assurequalitypainting.com/uploads/1/3/0/7/130739766/eeb92f8b.pdf
    • http://hebridean.org/uploads/1/3/0/5/130588505/3883757.pdf
    • http://pcitcv.com/uploads/1/3/0/7/130776083/doduxumipazujus.pdf
    • http://arkbookkeeping.org/uploads/1/3/1/3/131380210/xerezag.pdf
    • http://hoftenlaere.net/uploads/1/3/1/3/131381352/8081287.pdf
    • http://james-gleave.com/uploads/1/3/1/3/131382387/6164411.pdf
    • http://painfreethroughmovement.net/uploads/1/3/0/7/130739766/224928.pdf
    • http://amandamclaughlin.com/uploads/1/3/0/5/130590138/e16afeb4e49.pdf
    • http://madisonteethwhitening.com/uploads/1/3/0/6/130604706/susugebumijawibi.pdf
    • http://shynecnc.com/uploads/1/3/0/5/130550764/senen.pdf
    • http://resolien.com/uploads/1/3/0/2/130272640/6911652.pdf
    • http://jualhydraulicbreaker.com/uploads/1/3/0/6/130620217/3010437.pdf
    • http://vopni.ca/uploads/1/3/0/4/130435624/fomukejujeruzi.pdf
    • http://coniymartin.com/uploads/1/3/1/1/131163538/febajuxudul.pdf
    • http://thequantumsecret.net/uploads/1/3/0/7/130775629/kagowapirexubuzino.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off000087f3.bin
4a002837c39f3c3d4005d4d7d76ce834154dc1424cde1841470a04a4fcab16a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 9852 bytes

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