Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0852b50d444fad…

MALICIOUS

PDF

82.0 KB Created: 2021-03-17 17:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cdc36ff923a1b80dc9f1d8f94853cad8 SHA-1: 72774f45f87f0f941130e5decc03e5ec5a81f5d0 SHA-256: bc0852b50d444fad4b73c7d77f940cfbfafb48fb0a2b888fa3656416094bb65d
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the sample's structure as a link farm on disposable hosting, reinforcing the phishing or malware distribution hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=2012+jeep+grand+cherokee+limited+reviews PDF link annotation
    • http://shoppingyxplus.xyz/genie_2022_owners_manualzi19b.pdfIn PDF document text
    • http://legexenajulejof.iblogger.org/22976019521.pdfIn PDF document text
    • http://gesamakim.22web.org/denon_avr_3313_4k_passthrough.pdfIn PDF document text
    • http://maykistore.ru/rimituvibositowunuzure6qwrj.pdfIn PDF document text
    • http://meblik.su/dnd_character_sheet_2020dicre.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/Yxijmhi/tekusonewusa.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/RJkZidj/checklist_app_android_free.pdfIn PDF document text
    • http://lemujivowukita.22web.org/brazilian_jiu_jitsu_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/gadapapar/gWuRYNv/dudikakegofisipe.pdfIn PDF document text
    • http://thechambre.xyz/xipapwrt2o.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/fukokabudujate_jobikif_vuniwasep_rurebegufavokok.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/b0heZ9m/fury_road_quotes_shiny_and_chrome.pdfIn PDF document text
    • http://xtina.online/how_to_replace_battery_in_portable_jump_startergp49f.pdfIn PDF document text
    • http://dusixose.22web.org/when_does_guardant_health_report_earnings.pdfIn PDF document text
    • http://lixedunodawu.22web.org/44297247107.pdfIn PDF document text
    • https://bozomobumaxal.weebly.com/uploads/1/3/4/8/134873382/3431272.pdfIn PDF document text
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/xijeludutodexapoz.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/8748575.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/bhagfGh/ironmaster_bench_review.pdfIn PDF document text
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/kezapimek-fadubi-bajutagafamiz-susitozobipeki.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/fjfjgve/sumazatusow.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
    • http://foxivowopejo.rf.gd/tratamiento_para_absceso_cutaneo.pdfIn PDF document text
    • http://zexukojol.rf.gd/free_spelling_dictionary.pdfIn PDF document text
    • http://timodetunidup.epizy.com/you_are_the_reason_piano_sheet_musescore.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/causative_exercises_2o_bachillerato.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_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 5800 bytes
SHA-256: 520684a76c59909f78f1e1c2fc78a67e625021d35c849e535756498874605b57
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 10488 bytes
SHA-256: 6886121eed4b97b0525adb1eeb00ca7e218d4f5dc85c1b7adbd22a9b20ed1ae1
font_02_sfnt_off00012bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BED 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230