Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ac832bf6b17eb3…

MALICIOUS

PDF

83.8 KB Created: 2021-03-18 06:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b1d5fa3e7ccb0bf7a5bd24b2ab686c3f SHA-1: 937419c57d3e734c19e677f6c22beb3f72f0088f SHA-256: f8ac832bf6b17eb3e9bc948433dcc554fd11d2ef8a3447f8970c8fcb79a8b2be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/strik?utm_term=creswell+2012+research+design+pdf PDF link annotation
    • https://cdn.sqhk.co/pozigafo/jgjjdh9/65257912439.pdfIn PDF document text
    • http://gatorama.fun/tefagativekuxogo1xyg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6017a51f962eb.pdfIn PDF document text
    • https://cdn.sqhk.co/najuvotuwoz/FHHhcgi/bitdefender_antivirus_offline_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_60149044bc44c.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/UqgBMgd/nhl_hockey_games_online_free_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hQjfAhd/airport_city_weekend_code_facebook.pdfIn PDF document text
    • http://bluhgang.best/tlauncher_bonus_codes_2019thcmr.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/hjiuZP0/vavedagam.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/fiiVEzQ/74018783866.pdfIn PDF document text
    • http://health2health.online/vipepo7vwlg.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/fWicJi5/pugubojapetewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496404/normal_5fcad55480d6d.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/if4xwRn/94668921162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe5fe4b160bf.pdfIn PDF document text
    • http://sewonmedix.ru/46091587353m4l7l.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/hfOhfKh/zombie_virus_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/hagdJXj/mibeboxoxawajibufixaruw.pdfIn PDF document text
    • http://wwbook.org/is_there_a_follow_up_film_to_me_before_youz7t8s.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://uploads.strikinglycdn.com/files/574a4176-1d36-4b50-a89f-a8cb11ac92af/how_to_use_a_maytag_bravos_xl_washer.pdfIn PDF document text
    • http://xuruganota.epizy.com/wakarelapabuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4571f12f-bee2-476a-8d1d-ceff164e9da4/19036429447.pdfIn PDF document text
    • http://wogosozado.rf.gd/3601650052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02b5607-c094-43da-a5f1-b0e1182bf86f/look_whos_back_eminem_song.pdfIn PDF document text
    • http://babudenipovux.rf.gd/earned_value_management_template_xls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a46ea3-1331-44c0-a7fb-22a988eed3cf/types_of_juice_for_mimosa_bar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 5456 bytes
SHA-256: 70e0c91ad040f367cc10b3518d9b90bde7f90c7da8ebfdff6d6da6539456313a
font_01_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 11740 bytes
SHA-256: c1b23c3fac9ff0e61196c2a74c9f6ad4c6d1be259fb4761023c2f0e731d6b769
font_02_sfnt_off0001336b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333