Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eab16c48d03315…

MALICIOUS

PDF

44.9 KB Created: 2020-04-01 12:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 432eb20127b7b9a3d744e1fac86514cf SHA-1: d53d9f93c5ecbb0a3c8569bc2884bbd4c6a2be14 SHA-256: 79eab16c48d03315ee31951f76ea7fbdc38be8da57e94ed637d877364df7cc67
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This suggests a link farm or a distribution mechanism for malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence indicate malicious intent, likely related to SEO manipulation or malware distribution.

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://pendle.ca/uploads/1/3/0/7/130776823/130776823.html#sony+kf-e50a10+tv
    • http://ebooks4sale.shop/uploads/1/3/0/6/130620970/55b9670833.pdf
    • http://intuitivecoaching.services/uploads/1/3/0/3/130323750/5187883.pdf
    • http://forsightvisionstore.com/uploads/1/3/0/2/130289813/negirukumome.pdf
    • http://sustainabean.com/uploads/1/3/0/7/130775558/kanexoba-jubizit-sasitagiragu-gofiro.pdf
    • http://stephthebabylady.com/uploads/1/3/0/8/130874284/bowegafe.pdf
    • http://sidrastechnology.com/uploads/1/3/0/3/130323600/85c29.pdf
    • http://siouxfallscountertops.com/uploads/1/3/0/5/130539315/bibatosame.pdf
    • http://powerhousehoops.net/uploads/1/3/0/6/130604359/xegodozeju.pdf
    • http://hautedeity.com/uploads/1/3/0/6/130621486/laxadisutufusovogava.pdf
    • http://thewinestopper.com/uploads/1/3/0/6/130605263/lojolerefepi.pdf
    • http://vanilladc.ca/uploads/1/3/1/4/131454492/1925775.pdf
    • http://nobssupplementsandco.com/uploads/1/3/0/5/130590537/bimigubaxesanat.pdf
    • http://brewandplowfarm.com/uploads/1/3/1/3/131380601/zuzetavilutujow.pdf
    • http://iljconsulting.com/uploads/1/3/0/2/130288924/0a20723c8a7595f.pdf
    • http://artifactspy.net/uploads/1/3/0/7/130740571/68737d31b.pdf
    • http://www.guestcaboose.com/uploads/1/3/0/6/130640190/2679838.pdf
    • http://xiomax.net/uploads/1/3/0/2/130291572/2f1fd2ff7851.pdf
    • http://swiftleads.net/uploads/1/3/0/8/130814673/fd4cbc1892c0a7.pdf
    • http://premiersouffle.ch/uploads/1/3/0/6/130604305/nakewuxitigumigekux.pdf
    • http://lgaasesoriaconsultoria.com/uploads/1/3/0/5/130588944/2359644.pdf
    • http://ironchefkitchen.com/uploads/1/3/1/1/131163851/40b446ed218fe2.pdf
    • http://natashagrover204.com/uploads/1/3/1/4/131408343/zivuvawesofilej.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_off000085d5.bin
8641fe6c15f22bdafe93832ae559c4cc5e9e1cb72a3a5434848c088e884a59d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 8440 bytes

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