Malicious PDF — malware analysis report

Static analysis result for SHA-256 2624ea196b63b16a…

MALICIOUS

PDF

97.5 KB Created: 2021-03-17 05:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5bb920f56e6097c99b56b7f4f44dd4fb SHA-1: 50f0f198a5a3116319401eb2012147145501ab95 SHA-256: 2624ea196b63b16a594a852eef491035cf7709f65340afe12db2add03f664820
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document body's deceptive content point towards an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=hamlet+soliloquy+act+2+scene+2+pdf PDF link annotation
    • http://timecodes.net/sovidesamanaxopalusddkui.pdfIn PDF document text
    • http://ilkertr.shop/40625368064llj1j.pdfIn PDF document text
    • http://copyright-infringement.business/graco_nautilus_65_3_in_1_car_seat_safety_ratinghoa82.pdfIn PDF document text
    • http://max-lifting.store/40329221795jgjby.pdfIn PDF document text
    • http://boldly-grow.com/outlook_email_template_builder53uba.pdfIn PDF document text
    • http://cocobeautybar.ca/vidmate_old_version_2._28_for_iphonewgc18.pdfIn PDF document text
    • http://bigtittybella.com/genozuvarz8eny.pdfIn PDF document text
    • http://abreudesigns.com/58809013254bwhd.pdfIn PDF document text
    • http://republvinb.fun/how_much_oil_does_an_onan_5500_generator_takes0be0.pdfIn PDF document text
    • http://ig-copyrightnotice.com/what_is_the_range_on_a_motorola_cp200wmljb.pdfIn PDF document text
    • http://daating19.site/blackjack_odds_guideb3f5n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/967e3fcd-1c2c-43a4-93ef-9f8644a2bf2e/25413674169.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_924f28f0c0cb4f10983c14e1c80e41d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c9b049-5c2d-4246-980d-5b9390b663ba/62868643632.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_e7743c2338f54c758874073d1bbe2333.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ccf4cd-cf22-4717-b740-9a628f0da9d0/resumen_del_libro_como_agua_para_chocolate_corto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cd1e7e-d53f-43c1-9748-4dc4a1d97a80/fundamentos_tecnicos_del_voleibol_resumen_corto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed53a8f-36ae-4795-a414-a594553731a6/how_to_pick_and_store_lettuce.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_fff6dac31d204417ad51f27f0c162db2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/756b7e73-b433-4f7f-ad1f-3e2c43e2e5e7/barujukulen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b080bb7a-f04d-499c-bbdd-be95d61fc3d7/22317149301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb8f78d-37bf-457f-855a-f561098ee375/jabesaxowozifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e571ffa4-3078-40ce-9077-6af6c127e0c3/how_to_apply_wet_transfer_decals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13459 5408 bytes
SHA-256: 3abd9383964e45867c100657ae4ef83d63a0c71ff290a4abbfa8a331e6538526
font_01_sfnt_off000146b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B7 10528 bytes
SHA-256: 3b9ac0c7e7bfa9146d0b8669d8c00eabbb9ca4dc439e02341284744fa040a08d
font_02_sfnt_off00016a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A54 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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