Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e38b6b44a3eaff…

MALICIOUS

PDF

81.6 KB Created: 2021-03-21 02:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79399734ed1e6b677de3b543d49e57e1 SHA-1: bf4a0379fcfe3c9016f058a73cf5a966f6f9c997 SHA-256: b5e38b6b44a3eaff5c6517780b50a01385adba3b25a0e7ef5c089041756967fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to domains commonly associated with malware distribution and phishing campaigns. No scripts were extracted, but the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=guitar+modes+lesson
    • https://cdn.sqhk.co/wemupaxuziv/NE2Qhik/3649539351.pdf
    • https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/vibomuxezipova_nedebut_ramomewagexu.pdf
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/9578ffc166ef.pdf
    • https://kikizesojumare.weebly.com/uploads/1/3/4/7/134718780/risugaxilobixezoli.pdf
    • https://cdn-cms.f-static.net/uploads/4366027/normal_604d2f247d176.pdf
    • https://static.s123-cdn-static.com/uploads/4475379/normal_5ffd61a663ac1.pdf
    • https://static.s123-cdn-static.com/uploads/4403822/normal_5fcc915b92f83.pdf
    • https://cdn.sqhk.co/zomuzesirira/blVKhdp/nvidia_games_download_atualizado.pdf
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/tunodoxomidit.pdf
    • https://cdn-cms.f-static.net/uploads/4451225/normal_6044713d88850.pdf
    • https://cdn-cms.f-static.net/uploads/4479224/normal_6019807067974.pdf
    • https://lopodegif.weebly.com/uploads/1/3/2/6/132695694/vuwabetaj.pdf
    • https://cdn.sqhk.co/mogizilo/f8TvYjb/fimoxuweninoziseza.pdf
    • https://cdn.sqhk.co/tozijizubu/XAghhit/jesasor.pdf
    • https://static.s123-cdn-static.com/uploads/4418188/normal_5ff1b8dd9fd52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/faf81a8b-a6f5-4228-a3a9-f656b56ca5a5/car_mechanics_book.pdf
    • https://uploads.strikinglycdn.com/files/46893142-dca9-4666-9a16-ef6923331333/23844619399.pdf
    • https://uploads.strikinglycdn.com/files/ee5bc7f7-8535-4cdb-85b3-d3795998c85a/wotokimavutexixope.pdf
    • https://uploads.strikinglycdn.com/files/e849b24f-7a40-4990-a368-5067c795d164/black__decker_the_complete_guide_to_wiring_updated_7th_edition.pdf
    • https://uploads.strikinglycdn.com/files/a1f95f3c-7abc-4f4f-a7c0-a1135e991b12/is_iron_good_for_working_out.pdf
    • https://uploads.strikinglycdn.com/files/f24c3e8f-d242-4199-95ed-59aeb8bf17af/xpress_redi_set_go_pizza_dough_recipe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cb.bin
323fa4dfee92a0a6aa853097d370bd98d4d96a5fd26f413638f9b9923e3d9905
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 4884 bytes
font_01_sfnt_off00010447.bin
c2e80ed46ca678303638e9bc2a5ba36c9f3be9a4443ef0eb27443387a3954063
pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 10868 bytes
font_02_sfnt_off00012974.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x12974 4324 bytes