Malicious PDF — malware analysis report

Static analysis result for SHA-256 634ea8ca13422359…

MALICIOUS

PDF

72.8 KB Created: 2021-06-07 21:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f577fbf9b9a2313730b6f999b3d99142 SHA-1: df38f52d96e477d39db43bfce28553051b38fef8 SHA-256: 634ea8ca13422359592a20a7d9ec3af8aa28a48e7f2c987744f14a8ae3e14c43
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains embedded URLs that redirect to external websites, such as 'https://jumiwimov.ru/wb?keyword=which%20film%20is%20doctor%20sleep%20a%20sequel', which likely serve as lures for phishing or to download further malicious content. The PDF structure also suggests it's part of a link farm, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wb?keyword=which%20film%20is%20doctor%20sleep%20a%20sequel PDF link annotation
    • https://kozunetumoniwav.weebly.com/uploads/1/3/4/4/134482294/lutabaxume.pdfIn PDF document text
    • https://zufezegudowoz.weebly.com/uploads/1/3/2/6/132683286/sopumajelivudi_puzegojineji_newimozizazopi_norotilaz.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/4770124.pdfIn PDF document text
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/2571328.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/2041484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144571842/grupos_de_whatsapp_de_jukilop.pdfIn PDF document text
    • http://zinezukajawe.pbworks.com/f/lizeduzuzozan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d168ff-9a97-4350-a806-6801b4d04966/pevanusevisab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487b2b97-167f-4709-9587-6ed4fb852297/xevasomaxoxobapumosovab.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/w/file/fetch/144536340/alanur_elifimin_oyun_ljaci.pdfIn PDF document text
    • http://zawepiko.pbworks.com/w/file/fetch/144811758/pokemon_moon_emerald_nuzlocke_gba_rom_hack_download.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/rogake.pdfIn PDF document text
    • http://sewafebi.pbworks.com/f/how_to_do_a_hard_reset_on_my_acer_laptop.pdfIn PDF document text
    • http://fevawigo.pbworks.com/w/file/fetch/144420981/56031541663.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/kakuxeribumukivik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc9555d-92e7-4481-85d7-2c10d8bc30ff/foods_that_are_not_goitrogenic.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/lovubuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5e708c-1325-40e8-9f53-0ebbb4cec4a0/how_do_you_explain_poetry_to_a_child.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/w/file/fetch/144438798/telecharger_tubemate_2.2_5_gratuit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 5532 bytes
SHA-256: 12fe72c23a25e957e8ecec6f27569d6f636703cd1bf3c0d4c4818a405af56c23
font_01_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 10804 bytes
SHA-256: 3ffe5c9776b72fc74ed5e0074b35024db55c210a94791ac660cf5dfa3377e455

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