Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d22099f45dc2989…

MALICIOUS

PDF

86.9 KB Created: 2021-03-14 07:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1111f22cd039c813f0213a6181471066 SHA-1: 990a12ed7793156dfb3699f391bc4eb21525ed65 SHA-256: 4d22099f45dc2989133a5c78c559c61680e322b0374901d6fd6917e88c7b15d8
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=protagonistas+de+bajo+la+misma+estrella PDF link annotation
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/41c16668a4430f.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/423dec095f1137.pdfIn PDF document text
    • http://healthit.space/35276588572mwz1j.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/1719080.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/c8Gggib/throne_of_eldraine_collector_card_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bimazizuxu/hdgc1Zv/sniper_ghost_warrior_contracts_gameplay_part_2.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/MjeRUe2/checkers_game_download_for_windows_10.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/1e8428f13f9dc0.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/2316531.pdfIn PDF document text
    • https://kusudojisopev.weebly.com/uploads/1/3/4/7/134774064/426d3365abf4.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/Qlahdji/7500989247.pdfIn PDF document text
    • http://legko.travel/dream_machine_gameplay7hz95.pdfIn PDF document text
    • https://lafezarawowaw.weebly.com/uploads/1/3/0/8/130874252/a1f963a5.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/miiyhf5/benedetta_caretta_height.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ijnjchf/alabama_road_trip_route_planner.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/gfhiPeq/bozupepawuliwivefixagezax.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/Cha198h/gta_5_zombie_apocalypse_mod_download_ps3.pdfIn PDF document text
    • https://cdn.sqhk.co/rufomezin/ieFFiaB/71244164768.pdfIn PDF document text
    • http://esmoney.site/can_shamans_use_daggersymswq.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/xegarowojopal-fawotuzitoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_3e22d07bd15748569a7028530c493d14.pdf?index=trueIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_e580f2ae4e384c0c942fe07ce0e61cb9.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_9af53cd2159d484faec02894fdbca283.pdf?index=trueIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_cc425239ab904fcfa750f04bf543696e.pdf?index=trueIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_3819ae1464774675aa5ba58971030360.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 5360 bytes
SHA-256: f40ad4e565c1070533a341e1e8c39d54c04f156c0c8a1aeca92caf6c2347e84d
font_01_sfnt_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 12180 bytes
SHA-256: fe2e4e3f5c1228da3ea31837af86d9ae038a4a2283737b8e775a861f5dc21918