Malicious PDF — malware analysis report

Static analysis result for SHA-256 b679a2580a4d62b0…

MALICIOUS

PDF

90.0 KB Created: 2021-03-24 23:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6b0b48bca19f33f5b8fda493d4fe9ada SHA-1: 27b71b62006214c486f475098dd57d996b855ebb SHA-256: b679a2580a4d62b06bf6f0ccb27dc02e996c6ea86b089e5865d038b407d85589
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical ClamAV detection and ML classifier flagging it as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were extracted, the presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites like lozipotod.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://lozipotod.ru/wix?keyword=my+little+pony+friendship+is+magic+game+cheats PDF link annotation
    • http://miiliioner.xyz/luzobumuxipoz0pcwt.pdfIn PDF document text
    • http://flebolog24.com/members_mark_3_burner_gas_grill_replacement_parts1dm3u.pdfIn PDF document text
    • http://bottlechainworld.com/half_life_calculations_worksheet_instructional_fairge2gv.pdfIn PDF document text
    • http://plafond.xyz/vtech_cordless_phone_with_answering_machine_manualhvrkp.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/luriburikadomul4s8z.pdfIn PDF document text
    • http://forecast.bet/world_cup_all_time_statskq0kv.pdfIn PDF document text
    • http://sberbank.services/dell_p2415q_manualbyy3r.pdfIn PDF document text
    • http://tuimag.ru/acorn_130_stairlift_manualiiii5.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/1394696.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/social_cognitive_theory_albert_bandura.pdfIn PDF document text
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/5f8a92643e3.pdfIn PDF document text
    • http://hellesypakk.online/junji_ito_collection_anime_openingqyewk.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/sirowekadasum.pdfIn PDF document text
    • https://paxepufa.weebly.com/uploads/1/3/4/6/134640660/mevemefewodeg-wawalorofinu-nedipigumuf.pdfIn PDF document text
    • http://abanca-electronica.com/subject_verb_agreement_exercises_for_class_11qqd2q.pdfIn PDF document text
    • http://rosipale.scienceontheweb.net/uses_and_abuses_of_mobile_phones.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/652af2a7-3932-4d06-b457-7688f64dc961/fewebajogu.pdfIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/kuvusurefelamawalowu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/19764624440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b392140-e2fe-43cc-ae56-760ea6119e5b/zinamiketowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d3cda2-d51c-43eb-b55f-2854822a2f47/98367944262.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/what_is_pbl_medical_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30781739-4dc7-43f6-ad17-4aa93b225e79/how_do_i_program_my_magnavox_universal_remote_to_my_insignia_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/15319181895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d615233-3a70-4b57-a90e-84a415827024/how_to_connect_sennheiser_wireless_headphones_to_lg_smart_tv.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
    • 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_off00010b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8D 5676 bytes
SHA-256: 0d76c073fc5440fc910daacda698d4f2fcd8fa7e458ecff9f939edf1043e5d67
font_01_sfnt_off00011ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 11424 bytes
SHA-256: 015ae68003b8c499b76590b191397b1b8194aa3486a2f33489ab1898f0244bc9
font_02_sfnt_off000145a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A7 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501