Malicious PDF — malware analysis report

Static analysis result for SHA-256 747abc7ac7ce0ca6…

MALICIOUS

PDF

75.1 KB Created: 2021-03-17 04:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3c4a6eab93bfcb7f4a43cb755cbec6a4 SHA-1: 54f813311739aae828d348dd8f129a4abac29474 SHA-256: 747abc7ac7ce0ca6ade440a5c02b3174c797bf7a31b61164b898a1ebde8737fe
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://jacksth.ru/wix?keyword=blood+drops+in+toilet' is likely part of the lure to direct users to malicious content.

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://jacksth.ru/wix?keyword=blood+drops+in+toilet PDF link annotation
    • https://cdn.sqhk.co/xubipoxeguza/hR15KfU/sizuxib.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/EjhDieS/vudepakamemiborove.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/BFhfref/ludo_movie_review.pdfIn PDF document text
    • http://dopogabijup.mywebcommunity.org/dewalt_miter_saw_stand_assembly.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/1hi7Gag/real_racing_3_online_pc.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/descargar_gratis_libro_tu_puedes_sanar_tu_vida_louise_hay.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/Njeghe5/royal_princess_subway_run_download.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/menopausia_y_riesgo_cardiovascular.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/9062530.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/8a4db60d675c7.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/basel_iii_regulations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_1254c8b2a2ee42de829bfccf6d396a37.pdf?index=trueIn PDF document text
    • http://miwewugewu.atwebpages.com/87149034085.pdfIn PDF document text
    • http://tudugir.atwebpages.com/capacitor_capacitance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1eba38-c713-476a-88da-10906da9c0e9/beburoruloxixafegamutolu.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/8676013346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76dad06-0dde-4682-88cc-d5da08429b25/feviponitofos.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_33eb7cbb8f984556947b891e42bd5ef8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/362e5ac7-9613-4d71-96d7-9d2070f98546/how_to_use_yamaha_mg10xu_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afdc1f8-d011-4118-96ea-e97ba3435f9e/gugev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fece7e81-f6d1-45f6-869e-5611046ed6fb/siwabofuzixidopefenupezim.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_dc16ce4031074c0e8a70808b553240dd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 4580 bytes
SHA-256: 7682a9851e8d943dae4d7fcfe356ac36cdbee5661b48e84c0cba0255b432ba02
font_01_sfnt_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 10160 bytes
SHA-256: 3596ad0c1baebb950c9de97e5a3b50e5b9a55ada8af51ca1904b3e8ee03b47bf
font_02_sfnt_off0001110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378