Malicious PDF — malware analysis report

Static analysis result for SHA-256 3405c15d1d11ed6e…

MALICIOUS

PDF

82.3 KB Created: 2021-03-28 06:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4db7c91d1db59d286df97d6b014ad37f SHA-1: 204f89e9a34c2dda264d3a41d26388df8ff99860 SHA-256: 3405c15d1d11ed6e4a6a2ef27d64575364c5b699dedb88dcd86d9f09444dbf63
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with a primary focus on directing users to 'botokaw.ru' and 'moxolesapudeli.22web.org', suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, appears to be a lure related to geometric formulas, which is a common tactic to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=formulas+para+volumenes+de+figuras+geometricas PDF link annotation
    • http://moxolesapudeli.22web.org/kovova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_602a234d4b570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_5fcc41aec462c.pdfIn PDF document text
    • http://getyourscore.info/mandated_reporting_laws_ohio09cjt.pdfIn PDF document text
    • http://zexawil.22web.org/calculus_practice_problems_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fde0bcdd0bc1.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/12926163198zuhm0.pdfIn PDF document text
    • http://healthyforczechrepublic.site/bosch_dishwasher_silence_plus_50_dba_not_startingww81b.pdfIn PDF document text
    • http://fovejawurolugaf.iblogger.org/free_workout_videos_like_p90x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_605961662a7c9.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/247b14aa-0eb8-4213-96a3-b615dcab2f5a/jiputefegopigoxesejitub.pdfIn PDF document text
    • http://lezebotetojezaz.epizy.com/jozerupomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321566ce-02ac-4037-9cfe-e87519ba71a1/how_did_world_war_1_affect_europe_economically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9f049e-9c10-432f-bc85-645419e7eb19/vosibisepifurijipanuxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b230ca1-1aa7-47a7-8096-bb81248a75f1/minove.pdfIn PDF document text
    • http://zivositad.rf.gd/bsc_magazine_march_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512d8621-2ff2-44f5-af92-ef0a6766c0a5/my_passport_wireless_pro_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7512046-b238-4c3d-bbb2-4d2c6e275b91/how_to_start_a_keto_diet_plan_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19663778-3d40-4be6-a0e9-cadcd2165109/how_to_set_watch_winder_for_rolex.pdfIn PDF document text
    • http://vugugevijoxudi.rf.gd/business_process_improvement_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a662fe-7ef2-4423-9552-812e158c36c6/understanding_media_the_extensions_of_man_apa_citation.pdfIn PDF document text
    • http://gavagipagop.epizy.com/35558860800.pdfIn PDF document text
    • http://pajilovusibu.epizy.com/functional_requirements_template_doc.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_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 5488 bytes
SHA-256: 772a8e775a1fbdea48d7bb7e876d37980dc356290269983cb90647f664021152
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 12160 bytes
SHA-256: 73576e2e7f13f6bb60f50d3ede9106b185aeda1a778f3b90c78980383d2f7d0e
font_02_sfnt_off00012444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12444 16196 bytes
SHA-256: 18337a07c9c44834262d20d91ee5da47d38261d0252b6cb37bc9cb74325b6b6a