Malicious PDF — malware analysis report

Static analysis result for SHA-256 517098998f6ece7c…

MALICIOUS

PDF

75.1 KB Created: 2021-03-04 08:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c92beec189a8348173ba353af4f6bcc7 SHA-1: 533ab861c49ab42ff3ae90226f2d0b701a877b99 SHA-256: 517098998f6ece7cb2637161e64de539952642f953acf63fe1efc1f49d972cba
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URIs, many of which point to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The document body itself is largely unreadable, but the presence of many links indicates a likely phishing or redirection attack.

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://dugedepap.ru/wb?keyword=when%20i%20was%20puerto%20rican%20movie PDF link annotation
    • https://cdn.sqhk.co/soredepel/h1PYhg3/launcher_hb_turbo_irons_review.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/pioneer_sx2_flight_case.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/lokin_fovofesetu_totikirop.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/zedumov.pdfIn PDF document text
    • https://cdn.sqhk.co/barevirus/djdgjXb/misoloforebapemiga.pdfIn PDF document text
    • http://teksalon.xyz/how_to_train_your_dragon_2167ef.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/how_to_fill_out_return_of_service_form.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/ps4_error_ce-33992-6_fix.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/kipefatu.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/HwigFia/sobupegiwekaparanufe.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/kinodamigir-nubolotekoda-tevakezogova.pdfIn PDF document text
    • http://car-test.pro/aristophanes_frogs_and_other_playsjen7g.pdfIn PDF document text
    • http://infonewstravel.com/how_to_set_up_a20_headset_ps4xltil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidepojedava.myartsonline.com/the_penguin_history_of_latin_america_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/hollywood_movies_2018.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/taco_bell_power_bowl_chicken_carbs.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/how_long_does_it_take_disability_determination_services_to_make_a_decision.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/busizonameraxudugilo.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/dowokutibokelogisutesa.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/26181370639.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_off0000e9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 5304 bytes
SHA-256: 0d53279ee5558a732ef49ffc3376035e3de7acd2509321eca78f71efe6c4381f
font_01_sfnt_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 10444 bytes
SHA-256: da839135ea7de8f5aa992aa2ea87752143503f627d4865dd6736459c5fbb6202

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