Malicious PDF — malware analysis report

Static analysis result for SHA-256 274dce924113615c…

MALICIOUS

PDF

82.4 KB Created: 2021-03-30 19:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 10b2dca1861bf2c7d9f5f234ca2d2d4a SHA-1: d65c323c1929c340eda92498b7be27ffb46dddf7 SHA-256: 274dce924113615ca5d292a1f9bec28e15e5dacb0f407ba1ce1b6d62f17cdb8e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/123?utm_term=shimano+antares+dc7+lv+manual PDF link annotation
    • http://manidat.sportsontheweb.net/antonyms_worksheets_for_grade_7.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/gibvig7/blockville_bridge_builder_physics_puzzles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5ff145e09e4d1.pdfIn PDF document text
    • http://golden-bridge.pro/storm_of_swords_illustrated_edition_reviewjc4m0.pdfIn PDF document text
    • https://cdn.sqhk.co/modebopogut/gcieFMs/lafododobuxajisipur.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/gjiiUge/25201016765.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/chahcfe/81710398737.pdfIn PDF document text
    • https://cdn.sqhk.co/rolaravez/jgcuuid/rise_up_game_online_unblocked.pdfIn PDF document text
    • http://vandify.com/making_inferences_character_traits_worksheetgus2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406793/normal_5ffffff88c432.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/m1zgdhj/live_radio_stations_on_spotify.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/dubojunisanekuvivufuvog.pdfIn PDF document text
    • http://xsale.trade/cae_test_1ikmz0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_6031dff415dd4.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/mezetar.pdfIn PDF document text
    • https://cdn.sqhk.co/xezakomujar/Docibic/tv_advert_script_format.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/cedric_robinson_black_marxism.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/tukewexelopexanoxub.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/heqgehg/most_annoying_sounds_roblox_id.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5fcabe65154a9.pdfIn PDF document text
    • http://axecheat1.xyz/624194750064eg1u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_009935e769834862828d3e67f3c3acf6.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_02e68589eb7749da89ececeb0e90eeae.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_78f28906266e41759aa942151cdcd243.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_e1aa47c07f6d4e6291c6cda7493b490c.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 5424 bytes
SHA-256: 171ad6998c27e55aa9322d14335600f43e5cf1f09e822b780f13e30124578963
font_01_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 11116 bytes
SHA-256: 5ef8d4fc454eb694537179bf16c8ab637a342450bc6c970d6e98b32ebd0c19e1
font_02_sfnt_off0001268b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268B 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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