Malicious PDF — malware analysis report

Static analysis result for SHA-256 752dab21b2117184…

MALICIOUS

PDF

78.9 KB Created: 2021-04-29 01:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3f8126bdfa37b7c1af630d9d75de37be SHA-1: 2baa9e66b6a6a9c638df67c60aaec73091332e00 SHA-256: 752dab21b2117184e170bf39d6f2ffb84925e6a8a0840f8faa0613995f116a4c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious or unknown domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to inserting page breaks, which could be a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=how+to+insert+a+page+break+in+word+2016 PDF link annotation
    • http://kvrovk.xyz/purge_conan_exilesba2ov.pdfIn PDF document text
    • http://my-credit.info/nogotuwusidiwezilezutotof34f7h.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/lhVjjai/3481818429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449990/normal_6068cf2403ff5.pdfIn PDF document text
    • http://mebesovinu.22web.org/plantronics_backbeat_sense_-_wireless_headphones_with_mic.pdfIn PDF document text
    • http://afracheat3.xyz/the_house_of_the_spirits_movie_online23u7d.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/ghahdie/dino_t-_rex_run_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/9yhd8ji/petiduno.pdfIn PDF document text
    • http://juvugewit.iblogger.org/nujodadifusij.pdfIn PDF document text
    • http://nutristrike-shop.ru/what_is_the_best_screen_protector_for_galaxy_a10etgb65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_605f6f45393ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9335ed20-dfbc-41fb-8bf2-d9ab2f770c25/who_makes_the_best_survival_food.pdfIn PDF document text
    • http://soxomipimumoraz.rf.gd/74462777269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e5a483-a3b6-4db0-a3d1-8aa839ea6387/mbo_t49_folder_parts.pdfIn PDF document text
    • http://belajuba.epizy.com/aurangabad_smart_city_bus_timetable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5afb803-fe0b-457e-8c73-d022b3fbbf49/the_lightning_thief_chapter_16_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75536f8-f8b0-4601-9380-3b513b723185/how_to_setup_mobile_hotspot_att.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93b0ceb-26df-4be7-9bd9-7e4f92bfb716/which_is_the_most_dangerous_prison_in_the_world.pdfIn PDF document text
    • http://dulibunaxojomo.rf.gd/video_orkes_om_adella_terbaru.pdfIn PDF document text
    • http://savekuf.rf.gd/bid_wars_mod_apk_2._19.pdfIn 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_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 5832 bytes
SHA-256: fbec5b95fb8ef1a9c91619ee47ffcd05116cae193ecdba9558fa2310d751f248
font_01_sfnt_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 10752 bytes
SHA-256: c142badd1c4faddef1c196c56fa35b15876803b10b888fcbaf703fa2a486bfa1

Open this report in the interactive analyzer, or submit your own file for analysis.