Malicious PDF — malware analysis report

Static analysis result for SHA-256 82741003f4844c24…

MALICIOUS

PDF

50.1 KB Created: 2020-05-15 00:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: d5093a0de0f9a930abe7c55b996147e9 SHA-1: aa53181a7b6493103d360a39046719ef6e3605cc SHA-256: 82741003f4844c24f727e3001a9c6183004c4abd77ef65b4a4c1d1bfc3da85f8
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding a large number of external URLs pointing to other PDF documents. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to manipulate search engine results or distribute malicious content through a network of sites. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://animasbodywork.com/uploads/1/3/1/4/131408930/131408930.html#affirmative+to+negative+sentence+transformation PDF link annotation
    • http://commandhealing.com/uploads/1/3/1/1/131163909/7485846.pdfIn PDF document text
    • http://jayshockblast.com/uploads/1/3/1/6/131637099/ruluvum.pdfIn PDF document text
    • http://robbinscleaningservices.net/uploads/1/3/0/6/130604405/jakokonevekim-gojekagawudiv-togejola-ponebom.pdfIn PDF document text
    • http://generationmuso.in/uploads/1/3/0/4/130483498/movinofolo.pdfIn PDF document text
    • http://allenhomestaging.com/uploads/1/3/0/6/130604026/f9b5892f5217.pdfIn PDF document text
    • http://insurancebynathan.com/uploads/1/3/0/6/130621388/3308174.pdfIn PDF document text
    • http://suddenlysouthinteriors.com/uploads/1/3/1/3/131384432/87090ff5d584.pdfIn PDF document text
    • http://gatecitywholesale.com/uploads/1/3/1/4/131407892/sanikikipiliverajas.pdfIn PDF document text
    • http://primecutmowinggarden.info/uploads/1/3/0/2/130289553/gelixi.pdfIn PDF document text
    • http://inkgenio.it/uploads/1/3/0/6/130620468/cb013c951c78d.pdfIn PDF document text
    • http://serviertransformationdigital.com/uploads/1/3/1/8/131856121/sezaxexazaper_bosuwoluf_jofosope.pdfIn PDF document text
    • http://gnoraos.com/uploads/1/3/0/3/130312916/vezodat.pdfIn PDF document text
    • http://coloradoqualityflooring.com/uploads/1/3/0/5/130540461/4464382.pdfIn PDF document text
    • http://barriocuarto.com/uploads/1/3/1/6/131637362/663649.pdfIn PDF document text
    • http://madelineliao.com/uploads/1/3/0/5/130543656/8400438.pdfIn PDF document text
    • http://gritinvestments.org/uploads/1/3/1/3/131384306/9038234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 12016 bytes
SHA-256: 3232bdcd35b779520b5d2a694ab81bcd4274208fd4d3ec9b1039a68f815712a4
font_01_sfnt_off000095a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A0 11272 bytes
SHA-256: 7a4c26359170f3c28f5bc0ab14866f3f7c3dc40e5acde0860922074949b00485

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