Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dfc01798205c09…

MALICIOUS

PDF

43.5 KB Created: 2020-06-12 05:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 593c0f98c707987181b56ab11e11805b SHA-1: 2e723fd8c0a919c8784a8af00aa16e362db41527 SHA-256: 01dfc01798205c0921df68440c2583427589ac5ba84b7d79491d41987bf3e8dc
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a potential link farm. The embedded document body also contains several of these external URLs, suggesting the document's primary purpose is to redirect users to these external resources. No scripts were extracted from this sample, but the sheer volume of external links points towards a malicious intent, possibly for SEO manipulation or to host further malicious content.

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://joinorchestra.com/uploads/1/3/0/8/130874544/130874544.html#business+and+technical+english+writing+pdf PDF link annotation
    • http://kaiouti.com/uploads/1/3/1/4/131408117/jagamava.pdfIn PDF document text
    • http://geekspot.ca/uploads/1/3/0/9/130969012/puloled.pdfIn PDF document text
    • http://keith.secure2ware.com/uploads/1/3/1/1/131164393/xozawuw.pdfIn PDF document text
    • http://cr.undesirable.us/uploads/1/3/1/6/131636702/nifavitenif.pdfIn PDF document text
    • http://amyjdesignsandillustrations.com/uploads/1/3/1/4/131437815/e15ea7e2ba.pdfIn PDF document text
    • http://nwcinc.org/uploads/1/3/1/1/131164120/77365.pdfIn PDF document text
    • http://anlaghien.org/uploads/1/3/1/4/131438651/8739786.pdfIn PDF document text
    • http://goodnightmooncamping.net/uploads/1/3/0/7/130775334/vudotuwilowil.pdfIn PDF document text
    • http://meloveyoulongthyme.com/uploads/1/3/0/6/130620797/58c37bc20ea.pdfIn PDF document text
    • http://moonlightled.ca/uploads/1/3/0/2/130271030/bd61e8c3ec.pdfIn PDF document text
    • http://hostmaster.cystitiscure.co.uk/uploads/1/3/0/7/130774999/3d30d51.pdfIn PDF document text
    • http://gentlespiritsproject.com/uploads/1/3/0/4/130483045/7737709.pdfIn PDF document text
    • http://merveillessucrees.com/uploads/1/3/0/2/130289252/matijim_juvopa_bojewile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kuziboki.files.wordpress.com/2020/06/rurimavimidajiwuw.pdfIn PDF document text
    • https://depitexexu.files.wordpress.com/2020/06/98894851242.pdfIn PDF document text
    • https://viboxutup.files.wordpress.com/2020/06/93435738527.pdfIn PDF document text
    • https://xefipun.files.wordpress.com/2020/06/64524831372.pdfIn PDF document text
    • https://zipojuroxob.files.wordpress.com/2020/06/koguzefuzukiwawinovevuwiw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10092 bytes
SHA-256: 51bb66e4a681a5bae3cfdeec62d071de40dcc064bb4c17ee98333a8a23bf4a09

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