Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00de03ce9e2e63d…

MALICIOUS

PDF

77.2 KB Created: 2021-01-28 22:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2c7add16475c6e69828eb27a8b3e0ddf SHA-1: 9aa90b39e5581b4cae9121966cc4f34ab65b5eed SHA-256: b00de03ce9e2e63d707bc535ae83b8a04c2697a1824b6e8036f36083cda52d58
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. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious content.

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://druttle.ru/123?utm_term=orthographic+projection+pros+and+cons PDF link annotation
    • http://kakerusejom.iblogger.org/mefenus.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/cgegiCL/fire_and_waterproof_safe_home_depot.pdfIn PDF document text
    • http://latencfsrt.space/civil_war_pictures_of_dead_soldiersa7w56.pdfIn PDF document text
    • https://cdn.sqhk.co/solaxutom/i4Bgehd/17230341321.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/background_images_hd_1080p_free_car.pdfIn PDF document text
    • https://gapuropiti.weebly.com/uploads/1/3/2/7/132740804/datenuto.pdfIn PDF document text
    • https://kubuvapag.weebly.com/uploads/1/3/0/7/130776206/e4278177e0a33f.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/Fjahfjc/best_buy_credit_card_number_phone.pdfIn PDF document text
    • http://fly-drive.online/united_merchant_asset_recovery8576h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_600cc8e24a973.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/LjhjbB0/car_x_drift_racing_mod_apk_hack_download.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/duwux_ketojunak.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/rebebixugoda-veboti-vopizuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490127/normal_5fe54ff7bcb4d.pdfIn PDF document text
    • http://detonic-romania.website/god_is_not_greatn7r82.pdfIn PDF document text
    • http://boomua.site/537157072kolrw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vukefuxi.epizy.com/11155610351.pdfIn PDF document text
    • http://jezesukawug.rf.gd/axis_and_allies_original_rules.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/case_information_statement_nj_family_court.pdfIn PDF document text
    • http://vanomuwoz.epizy.com/pipiz.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_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 5404 bytes
SHA-256: 427c5c0982c25946596be0d7d5553ce1cd0c96aa6c197224109b1abeaa980f8e
font_01_sfnt_off0001030c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 10612 bytes
SHA-256: 8bc597f1ef85551fb15c4bc3062955b082f37357e820afa37337e4c6c12ec0ae

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