Malicious PDF — malware analysis report

Static analysis result for SHA-256 64021499770fd28e…

MALICIOUS

PDF

88.6 KB Created: 2021-03-26 12:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d76e88aaed3e9cc7ba4aaceabb4bef6 SHA-1: ee66782a54f445960d0afc6452d837e7cb9a4645 SHA-256: 64021499770fd28ebd6df3d0e424a41a5759181f089dbfd11c059f509a3230d2
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, likely to obscure malicious destinations. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly suggest an intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/award?keyword=abdomen+agudo+pdf+pediatria PDF link annotation
    • https://cdn.sqhk.co/rotusorukazi/ItidieE/basic_computer_ppt_presentation.pdfIn PDF document text
    • http://gallery-shop.site/domain_and_range_practice_worksheet_answer_keyeilws.pdfIn PDF document text
    • http://healthyforczechrepublic.site/gofelotoguxolarifimux24txq.pdfIn PDF document text
    • http://bossyonlinex.com/cronica_de_una_muerte_anunciada_pelicula_completa_en_espaol96gyy.pdfIn PDF document text
    • https://cdn.sqhk.co/bumigorawi/Xjg5vie/sim_card_information_by_mobile_number_in_pakistan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374211/normal_6000e5c377108.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/javeruwud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_602a118da5b75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5fcbc22418a66.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/Whjgfih/neha_kakkar_all_song_video_youtube.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/lolinapeva.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/geifihE/84446463450.pdfIn PDF document text
    • https://dupujemewo.weebly.com/uploads/1/3/4/0/134040979/xitajof.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/jfThgjr/kitelawamibuditilulibelep.pdfIn PDF document text
    • http://bizbize-yeteriz.org/swat_season_4_release_date_hulueahnm.pdfIn PDF document text
    • http://generatorsale.ru/ib_mock_exam_2020s7a3p.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/loxefanimiv-bowaziv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_603944e8874bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terujak.epizy.com/75486259822.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/mercury_9.9_outboard_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/annihilation_of_caste_by_dr_ambedkar.pdfIn PDF document text
    • http://jisokewiw.epizy.com/meroluvabi.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_off00011c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C86 5280 bytes
SHA-256: 0b152789802dbb5c041c990425d56d0ae298ec9dfe0212ae2be1f04ac685260a
font_01_sfnt_off00012e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E64 12048 bytes
SHA-256: 227f08134a27a7f29a7c740af066c77161758b3c2dc5374cfad96415e2795fd0

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