Malicious PDF — malware analysis report

Static analysis result for SHA-256 496b1625697847c7…

MALICIOUS

PDF

104.1 KB Created: 2021-03-13 23:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9d6bdac7cb41a85e2685253a19d1ded SHA-1: 7d7e085be033902de025ace66f1525d4feffb3c4 SHA-256: 496b1625697847c7a40a48ece7ab10d9dd738ff87e761cac524ab87b4691bbbb
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic flagging it as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of many external links suggests an attempt to redirect users to potentially malicious sites or engage in SEO abuse. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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://leonvi.ru/wix?keyword=task+role+behavior+in+interpersonal+communication PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5fff0d0a02bde.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/mivofiven.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/positioning_strategy_journal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_6002ea979d313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ff4136b16f.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/xivokalil.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/71602735944.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/what_does_canon_mean_in_art.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fd81619322eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fdefc13485ea.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/hoover_steam_cleaner_replacement_pads.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/how_much_does_a_town_car_service_cost.pdfIn PDF document text
    • http://tadekigede.22web.org/dexijipiwuzaxalufikever.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danesanifulen.rf.gd/ranawijajufowapet.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_56b05e1eb2cc4d328f2df20a7fda87e7.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_9744091ad89241be9bfb1b3b03208afc.pdf?index=trueIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/86375728601.pdfIn PDF document text
    • http://kelujatideligo.epizy.com/canon_5d_mark_iii_manual_focus.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_b71228d749884fb69d238c09d605649e.pdf?index=trueIn PDF document text
    • http://bolirazebaf.myartsonline.com/77021732047.pdfIn PDF document text
    • http://roxegubipav.epizy.com/lizoxijumosebarevev.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_29f16a176d0d40b89ff610ed6433daf9.pdf?index=trueIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_e00a3a1417b340f39271962a1111462f.pdf?index=trueIn PDF document text
    • http://mezotavexojo.rf.gd/scratch_platformer_physics.pdfIn PDF document text
    • http://vatezajis.rf.gd/vozomulivewi.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_off0001599b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599B 5384 bytes
SHA-256: 76d5b3bef4301f537eb0d7bece20b7352e2234a00899cfd7eeb1ceb1db33d1e1
font_01_sfnt_off00016bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCC 11236 bytes
SHA-256: b7336a7e8cff0cdb07eeaaae07a43e3097891c5e68d2d6690e799d401510e70d