Malicious PDF — malware analysis report

Static analysis result for SHA-256 1459ce7b1e73843c…

MALICIOUS

PDF

69.3 KB Created: 2021-03-14 13:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e2836d392369e40641c053c10b3ca356 SHA-1: 7dea41e137e831a1b3809c871499f7e9cc378e0b SHA-256: 1459ce7b1e73843c97da929870631d182a78d6eff785edba358220af0ad62c9a
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed to host many links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=watch+burn+notice PDF link annotation
    • http://remoliwagofaju.mywebcommunity.org/29736940275.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/jdhejaw/mepobanatoritapetepulago.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/vonovazupajajupeve.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ybgjJZJ/88563470379.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/b16AHih/velaxefopejazabemaga.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/dCihifI/bluestone_and_hockley_email.pdfIn PDF document text
    • http://medicalpracticementor.com/crv_car_reportct5hm.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/88007345982.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/hjhI2jg/55346546713.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/gg1jdAE/piggy_go_ski_race.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hsgfjc8/daiwa_double_clutch_lures_bcf.pdfIn PDF document text
    • http://watertea.space/2937195839dl527.pdfIn PDF document text
    • https://cdn.sqhk.co/lawatatun/ijWGghR/symmetry_worksheets_with_answers.pdfIn PDF document text
    • http://portkamesto.site/badimagodotidoxud3gh9j.pdfIn PDF document text
    • http://circleshtang.xyz/vizio_32_inch_tvuehc8.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/9fb509e3-8e2c-4eec-bce3-5dd2c6186be3/jump_force_all_dlc_characters_list.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/61970707627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdc84a0-e4d0-4bf7-b08e-38e613134a5f/jesuneni.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/common_mistakes_in_spoken_english.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/sunbeam_heated_throw_controller_flashing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/742d9f40-b268-4ffc-a330-78f070e1cfe5/will_there_be_a_season_5_of_the_crown_on_netflix.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_off0000d2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D7 4828 bytes
SHA-256: e45d9f09c027cb9d0c08cf635dae79a3ac66e72ab8ab1f34482011091044ed3d
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 10764 bytes
SHA-256: 52d9450870db028c7271661c0a7ee14dde86cfad06a6e2289e59712db88536a4

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