Malicious PDF — malware analysis report

Static analysis result for SHA-256 496738e3c5f7d26d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-31 13:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecd183e739ea3e729e673e5d9663bf23 SHA-1: 549d844218bac5d81dfb1018d8c6525c3bd1165a SHA-256: 496738e3c5f7d26db82612b8fa32527e125192833d66ea0c036c38f68272553e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://mezovuduw.ru/123?utm_term=dead+by+daylight+free+full+game PDF link annotation
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/a3cd6bb568c3.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/fonax_polifipodop.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/lopapofanusesire.pdfIn PDF document text
    • https://dubebonu.weebly.com/uploads/1/3/0/8/130874554/rifenorojazu_figite.pdfIn PDF document text
    • https://rafitiwaxaxeb.weebly.com/uploads/1/3/4/9/134903343/xeritapevowo_wifudol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6036f2748859b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6026853b5f9c7.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/porumimeliziwak.pdfIn PDF document text
    • https://memudodonimik.weebly.com/uploads/1/3/1/4/131406547/xovulanoxojoxozepe.pdfIn PDF document text
    • https://wixewolo.weebly.com/uploads/1/3/4/5/134577565/6047550.pdfIn PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/1460147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478402/normal_6058e2d9670ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_601f2bb8f0df0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/ratuxanudadimatijumamuram.pdfIn PDF document text
    • http://fuxazulofonu.epizy.com/byculla_to_bangkok_free.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_7d9d3b6f34924ed3a88410f3783e9da9.pdf?index=trueIn PDF document text
    • http://tuxusar.epizy.com/18448507964.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/2394642179.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/fuviku.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_66187e5737a743f49f28c6e90db51e37.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 5384 bytes
SHA-256: f47e23115b05e89928cbc818dd685f3849e37f0e66606972386032dc2a57e5ff
font_01_sfnt_off00011242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11242 11188 bytes
SHA-256: c2d17674bc0d43cf7f96aaa7d11a4ee21899b5079375db7e632dae6a8c95c701

Open this report in the interactive analyzer, or submit your own file for analysis.