Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2deec21fdf65d89…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 03:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4afbefc9c85e0d7478e2acfe6fa1356e SHA-1: 1de4f80323caec64d7a4fb0e005cf3783d333031 SHA-256: c2deec21fdf65d89d3e1ca09a642cc4b7404328a3d988ede921c949a57c97896
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://seumenha.ru/123?utm_term=tranzit+blu+hf+not+working PDF link annotation
    • https://xapeposatu.weebly.com/uploads/1/3/1/4/131437079/5604188.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/buwesuxi-fasafaxoni-kizometar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_6026d3b8c5996.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/3437321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_602586210e678.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/6a04b754a4b.pdfIn PDF document text
    • https://segunimumise.weebly.com/uploads/1/3/1/0/131070895/nimed.pdfIn PDF document text
    • https://regujimupakuve.weebly.com/uploads/1/3/5/3/135348903/sosetaxevem-magixavorabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417033/normal_5fcc4c2fd9f1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5ffe8e8a0f374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fd2e6c3b3533.pdfIn PDF document text
    • http://itchia.space/aplicacion_de_modelos_de_inventarios_deterministicos_y_probabilisticosmex5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_5ffab351ccf21.pdfIn PDF document text
    • https://tigopovon.weebly.com/uploads/1/3/4/2/134235173/40e18be0.pdfIn PDF document text
    • https://tinozewadewuxa.weebly.com/uploads/1/3/1/3/131398338/jodex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_60179f1720614.pdfIn PDF document text
    • https://jokuduzasaru.weebly.com/uploads/1/3/1/3/131381103/wejuxufiwiwimon.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://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_off0000d625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD625 5148 bytes
SHA-256: 9912c5290d9d8fc071a9853edb2331824d245a8bd69db3031eaa7732de7552d2
font_01_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 10444 bytes
SHA-256: 06c1807a399f32e01c494f99c513dc54f3de35912b5b4944c0f888cb36451cd5

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