Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90f22e860240d64…

MALICIOUS

PDF

65.6 KB Created: 2021-03-20 03:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2558a5d12b65f27f3a40a6d3677d957a SHA-1: 5903cb4612791e373f993e6f20611540997e2e56 SHA-256: d90f22e860240d64c31bafcb367f94d5c70da22bbe20490e5ff4ee4b7e7cef39
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary URL appears to be a lure related to a book chapter, likely to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8953

Heuristics 4

  • 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
  • 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://kuzutuzo.ru/strik?utm_term=history+alive+the+ancient+world+chapter+4 PDF link annotation
    • http://segwaywheelchair.ru/53671647822bzg0m.pdfIn PDF document text
    • http://gijipodotetojo.22web.org/budujekirawonemivijipafe.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/hssc_lab_attendant_question_paper_2020_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378393/normal_5fed944187ec3.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/bandicam_free_serial_number.pdfIn PDF document text
    • http://trenolgia.buzz/wajidads29cy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_6047f3acec700.pdfIn PDF document text
    • http://seplafond.xyz/the_perfumed_garden_picturess0ttz.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/48640286977.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/how_to_make_cool_science_projects.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/sojuravewi/65451507871.pdfIn PDF document text
    • http://xizanisud.epizy.com/lidiv.pdfIn PDF document text
    • http://muvamubas.atwebpages.com/dodejakevilewusad.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/vijumemaviradaforajorul.pdfIn PDF document text
    • http://zawenorite.rf.gd/breville_bov450xl_mini_smart_oven_best_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/93207153831.pdfIn PDF document text
    • http://lixurun.epizy.com/xikefajix.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_45c8f2a44c9f4a58a7716e1bfd0f24ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/66820547165.pdfIn PDF document text
    • http://padekapekalerel.rf.gd/alcoholism_and_depression.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_61c9bc0e52124542af710e601544ccbf.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 5464 bytes
SHA-256: a28593494520a64bbe3cc68799662666bcaaf65ca31902a73855deb0437b4d62

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