Malicious PDF — malware analysis report

Static analysis result for SHA-256 0363d573300ec475…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 22:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c9ec39a9d647519272085936fe8007f5 SHA-1: cec82c6ecd33d5bb698c796494d633c3f8f0c70f SHA-256: 0363d573300ec475074f54024ee452c212111a798af55c4bed1a6cdc7f0718b6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'mezovuduw.ru', which is presented with a keyword suggesting a lure related to the game 'Dantdm happy wheels school'. The PDF also functions as a link farm, hosting numerous links to external PDFs, many on disposable domains, indicating a likely attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the overall structure and URL suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=dantdm+happy+wheels+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483855/normal_600c3d08d795d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_60535b4d63b4c.pdfIn PDF document text
    • http://vorecan.space/59808749905n8wvg.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/ecosystem_worksheet_ks3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fed38fb3bbb8.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/tidadinowetidap.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/vanilokem.pdfIn PDF document text
    • http://optalpha.com/50676124346uzyrr.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/jiboforazusofame.pdfIn PDF document text
    • http://help-service-support.com/wwe_fastlane_2019_results_bleacher_reportmqjj4.pdfIn PDF document text
    • http://pigirajeku.22web.org/how_to_mend_a_paper_shredder.pdfIn PDF document text
    • http://copyright-infringement.business/lifizuguzasoy4mm.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/97552508069nvbdk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_605a7fe3ba5f5.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/naniz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabonozekes.epizy.com/nomunaxibuxuve.pdfIn PDF document text
    • http://mabagojovas.epizy.com/the_drama_of_scripture_summary_book_review.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_c488af7fce81429a94a89f407a84dd06.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_0bac55cfcfd94608888aff2f44a16849.pdf?index=trueIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_477b70cf865c478d80be0eae6778f1e2.pdf?index=trueIn PDF document text
    • http://bonizeza.epizy.com/avaya_answer_back_feature.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE88 5412 bytes
SHA-256: 47169f5e939df97a551280c5f5e1fc8183c4cbf0ea651053a0c290984255c63b
font_01_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 13168 bytes
SHA-256: 75fdd98421cc24b8327d7be0a754197c29b09a7243729726fe1c03b48da863c3

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