Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b586aa9d11a07b2…

MALICIOUS

PDF

74.7 KB Created: 2021-03-31 02:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7797af67b0225e14a6ff666f18ef76c1 SHA-1: bc7599d099ae60100ea9849c0d1b3f10c78b25d8 SHA-256: 2b586aa9d11a07b23599a0f8978434c3b8983e0127f19da22810b6dc18b3f0d2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which is not inherently malicious but can be abused.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=preying+mantra+snapshot PDF link annotation
    • https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/018fb5f9ff.pdfIn PDF document text
    • http://899themes-demo.ru/how_to_study_for_nasm_cpt_examy4okg.pdfIn PDF document text
    • https://cdn.sqhk.co/varugefezum/ibrPliR/california_camp_fire_news_report.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/seguridad_jurdica_unam.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/wepinolejefoxi.pdfIn PDF document text
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/9174925.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/gjicjeb/difference_between_plants_and_animals_kindergarten.pdfIn PDF document text
    • http://rkconstructionsucks.com/jirowopefemiofy9l.pdfIn PDF document text
    • http://cactusvpn.live/pozidonirakavupapazamin0jjb8.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/jj3B7HL/latorobamebegorixitab.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/0a8f7.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_get_google_maps_to_update_street_view.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/Mgd4bgh/indycar_race_today_live_stream.pdfIn PDF document text
    • http://poverkavoda.website/video_sites_freejzqr5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_46d70c1c2f8e4a9ca9656e84012f1774.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_a645cea65325427f8ce737469ebd1949.pdf?index=trueIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_adbfb2cb4bad4d2fbf35d80d3326a76d.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_ca836754f7c4441094b779adde467cbd.pdf?index=trueIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/restaurant_business_plan_examples.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_0231587a83624e1c9df9c0ae2fb6a552.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_e40ff121170a4a93b1668f740bf58dff.pdf?index=trueIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_78559ae66adc43bba51f0cbcd444da26.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF37 5304 bytes
SHA-256: 153688c49e8c3e04ff3b2bf24bb863b6626dfc6f04627389f9893c91c1e6088b
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 11564 bytes
SHA-256: 7fda84dfbb611a348dc579fc1e0102a6c8f3320e0acd35a9e5a19f9503447f7b
font_02_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 16084 bytes
SHA-256: fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3

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