Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5d836b3db6227d…

MALICIOUS

PDF

91.7 KB Created: 2021-02-28 00:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 222c61936234f08bcb8b735929db326d SHA-1: e340dada6c505f8864d158b92854c29d1508f02b SHA-256: bb5d836b3db6227ddb28c707cd2f1d08ffce2121fc552751293894681bfff578
66 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to disguise malicious links as legitimate content, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=divina+comedia+de+dante+alighieri+resumen PDF link annotation
    • https://cdn.sqhk.co/kifavubivelo/gdgxeib/tafag.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/Ehgjihj/app_infinity_per_smart_tv_lg.pdfIn PDF document text
    • http://trysol.xyz/18256879756pwkat.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/hbGD1hd/93303108056.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/cigjhgc/69045925885.pdfIn PDF document text
    • http://ewwe.space/bird_of_paradise_yoga_pose_benefitsgx6kv.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/FSGhecu/charm_city_kings_netflix_trailer.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/fatutisibikejigub.pdfIn PDF document text
    • http://recepty-dd.info/home_depot_bookshelf_pegsc9kg1.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/92OUgdA/89828310524.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/yhdhdgj/arcade1up_ms_pacman_cocktail.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/hiZWhbj/monster_crafts_food_truck.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/5haxihj/extreme_highway_traffic_bike_race_impossible_game_answers.pdfIn PDF document text
    • http://bazis-rostov.com/tutawaloguxaverojotokine2m.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/tuxexi/buell_lightning_xb12s_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/bakteri_bacillus_thuringiensis.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/59217290897.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/advanced_cfop_method_download.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_off00012696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12696 5412 bytes
SHA-256: 4cf981fc5032bb9b6107701d16d80c8c160fbe4f335346f67ab6481728dd8014
font_01_sfnt_off000138dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DC 12748 bytes
SHA-256: 9841359ae03fc30230395cbc00b3eb1c01232e53812b5cc7c2053792b13e6b56

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