Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84f0e46e96c17ba…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 22:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0abc4ff5dc2bd12401e30be995d65709 SHA-1: 7e199f09e4a10a8996a4f1432991c547bfadeae4 SHA-256: d84f0e46e96c17ba72bfdc1c58e3ac7900a18a553e96fcec813f76fd81e58eb2
66 Risk Score

Malware Insights

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

The PDF document contains numerous external URLs, many hosted on disposable domains, and is flagged by a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the link farm heuristic indicate a high likelihood of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=how+to+reset+bosch+dishwasher+e15 PDF link annotation
    • https://cdn.sqhk.co/varugefezum/Eii6ibZ/givevotelumaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/hbRqjbo/berovelupobimuresenomop.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/9gigcqI/63365997957.pdfIn PDF document text
    • http://qiwi-wallet.online/2012_ford_econoline_oil_resetk7c1e.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/jBifXjd/85391989193.pdfIn PDF document text
    • https://cdn.sqhk.co/dodidubi/Luljeif/read_along_books_for_first_graders.pdfIn PDF document text
    • http://rivalo130.com/90656525803oexws.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/ghhirih/flights_to_orlando_florida_from_boston.pdfIn PDF document text
    • http://therarbooks.com/using_the_quadratic_formula_worksheeay7sv.pdfIn PDF document text
    • http://podarokinsta365.site/britax_infant_car_seat_height_and_weight_limits5t6qx.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/jhggirm/warzone_season_6_guns.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/Zig5ico/castle_map_minecraft_1._14._4.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/will_my_samsung_tv_have_disney_plus9wjh4.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/ijkjdJU/zombie_2_the_dead_are_among_us_1979.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/eKqjcoH/45220269310.pdfIn PDF document text
    • http://13millions.store/formas_de_comunicacion_oral_de_los_pueblos_indigenass9iar.pdfIn PDF document text
    • http://azalea.store/hbr_guide_to_negotiatingyqqaj.pdfIn PDF document text
    • http://goods-amzon.com/al_anon_12_stepsvvfmn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nezebur.epizy.com/complete_acupressure_points.pdfIn PDF document text
    • http://gipenebome.epizy.com/free_diary_of_a_wimpy_kid_cabin_fever.pdfIn PDF document text
    • http://gokonef.epizy.com/pitotetoxibanixag.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_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 5364 bytes
SHA-256: a5d2fe98ac0c54cf0deb1c8654e555a299c5771e5be8a4795908fd08079956c3
font_01_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 11508 bytes
SHA-256: 70dc4303dd163b373d5e95cc35602882102d74941d1730b614af4c826563d695

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