Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d765e974b55da5…

MALICIOUS

PDF

140.6 KB Created: 2021-03-20 23:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b867e0cff46041d40cf54d7e797707f0 SHA-1: 54700246cc6ba7a1aac86e6ab52a3e7e5467be82 SHA-256: 22d765e974b55da5041d44f3bd954cefa69a277de461459cf026ea1fe8038e59
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF is classified as malicious by an ML model and contains numerous external URIs, many of which point to disposable domains and form a link farm. The document body, though heavily obfuscated, contains text related to 'wkhtmltopdf' and a search query, suggesting a lure to a malicious website. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=adventure+quest+best+pets PDF link annotation
    • http://tonedomopoja.scienceontheweb.net/what_is_the_product_rule_for_square_roots.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/PAiahiH/marco_s_pizza_nutrition_large_pepperoni.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/ahhiajf/smart_podcast_player_wordpress.pdfIn PDF document text
    • http://bestcreditcheck.info/xegujawuzuluwio99c.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/adventure_time_city_of_thieves_snail.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_6032009b642a1.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/83721883019.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/zjcPie8/cannon_hit_target_shooting_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_6008dd7427116.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/suvuj.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/ammonium_sulphate_precipitation_method.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_605372edc599f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5ff65e0227aee.pdfIn PDF document text
    • http://paxabak.mypressonline.com/73944815947.pdfIn PDF document text
    • https://cdn.sqhk.co/puvijupem/owVorzW/4780753947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_603204c5a0cb0.pdfIn PDF document text
    • http://verification-help.business/81757861980durfp.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/36e463e4-3d44-4a66-b3e3-c4e633d2006d/codigo_de_etica_del_trabajador_social.pdfIn PDF document text
    • http://noroved.myartsonline.com/zeludifoxuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caaefd0-9e2f-4ccc-a54b-864d4e8fa896/guxure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f822d3d9-7aad-49af-84e3-bcf5ad9827d6/61926657245.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_off0001ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECFB 5024 bytes
SHA-256: 63e6ed9aca34994b20bd83a1e43fcd47ecfff250ef665fbd91ffaecf6b73b73d
font_01_sfnt_off0001fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE1D 11528 bytes
SHA-256: 8448dae585baf77138babf092880e0bed8a71f7b53895c1406322c20300faf37

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