Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2b6ae2cbd1c804…

MALICIOUS

PDF

90.8 KB Created: 2021-03-11 19:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a799dc2a840396388612d54e9ea08ee SHA-1: 8ea6f5da026dbc89cc9ff89d0a644eb9f72660cb SHA-256: 1d2b6ae2cbd1c804989c50f64791e5d990a7a11971f24e13e44a25014e496bd9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. One specific URL, https://mezovuduw.ru/123?utm_term=soul+knight+priest+guide, is directly associated with the malicious verdict. The document body, though heavily obfuscated, contains metadata suggesting it is masquerading as a guide, likely to trick users into visiting the malicious link. No scripts were extracted, but the overall structure and URL usage strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=soul+knight+priest+guide PDF link annotation
    • http://wuduwoguto.22web.org/78342248662.pdfIn PDF document text
    • http://siondez.ru/motorola_astro_spectra_manualxvjbb.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/om_bhur_bhuva_swaha_lyricswxzdq.pdfIn PDF document text
    • http://opensalon.xyz/zafanikizapofadetujifimgqvgk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_6011ddcfd2b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470830/normal_6021f6da0e8a5.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/dogadasodu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fee8696456b6.pdfIn PDF document text
    • http://gmetry.online/kixusutawivewuroxolomej0o8fe.pdfIn PDF document text
    • http://leree6.club/kevezomexetosogaf5m3o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8320b5-f121-4130-b732-2c958674e7f8/how_to_reset_your_wii_u_gamepad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1480b45a-a6b3-4502-b127-202ab873cf52/watchmen_comic_chapter_summary.pdfIn PDF document text
    • http://jedajokojar.epizy.com/ps_23_1-6_kjv.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/93490022821.pdfIn PDF document text
    • http://joxumokuri.epizy.com/vuriluvibawenibo.pdfIn PDF document text
    • http://dunuruzofugavix.rf.gd/dezizivipugun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5145355f-6436-4263-b58b-c1135f16683e/68220195394.pdfIn PDF document text
    • http://dudolisimak.epizy.com/thomas_calculus_1_trke_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544f4814-589f-4eab-bae7-1c4bcb3fbdf5/kevowofegalif.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 4052 bytes
SHA-256: 1fd1ca99cebb5a0d8aa00006ad51c2f01455b341f2088556a6e39946daf0727a
font_01_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 5180 bytes
SHA-256: 981c4b155657f2e2a8a123d3375d63dd5d83666dbdf7a48ae45554dd666cb93b
font_02_sfnt_off00011ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF6 12084 bytes
SHA-256: 6b3b14cf0feb87e15808c2392aa196fad69bf30f6c5895c7b8261093770b3298
font_03_sfnt_off00014664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14664 16516 bytes
SHA-256: 095dbc21458da95aed75c669406c7d2aeed897f120b25d531c9392186d425d40

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