Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4719ef8ee177a87…

MALICIOUS

PDF

86.5 KB Created: 2021-03-30 08:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b851b7d5f3f07eb21847ce7938944ef4 SHA-1: 051b9217998b5f6a89bb7bec818100826baaf5e0 SHA-256: d4719ef8ee177a8799b8b0adf979c4ee3513f6ebfe6a24ad6068f6f15be1fd04
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting, many of which are part of a link farm designed to redirect users. The document body mentions 'Vidmate for android mobile apk', suggesting a lure for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://pelibifir.ru/123?utm_term=vidmate++for+android+mobile+apk PDF link annotation
    • http://padlamadla.site/debrider_baofeng_uv-_5rveftl.pdfIn PDF document text
    • http://edapog.online/eventide_space_pedal_power_supplypnwvq.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/oraciones_simples_resueltas_2_bachilleratovaj04.pdfIn PDF document text
    • http://fixmarker.fun/the_thrill_of_the_chase_book_onlineweu9l.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/jgjhgjf/alphabet_wolof.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/PhajEr8/son_of_zeus_movies_list.pdfIn PDF document text
    • http://wirelessinfo.ru/wexefojijab6er.pdfIn PDF document text
    • http://optalpha.com/213419991871jvl6.pdfIn PDF document text
    • http://kurs1.xyz/olympus_om2_user_manual6s9as.pdfIn PDF document text
    • http://tricitysikhs.com/the_crown_season_5_release_date_ukjz3ms.pdfIn PDF document text
    • http://trackcreditscore.info/best_pvp_strength_weapon_dark_souls_389bqc.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/33138897180u0z80.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/Ghbt5jh/ufc_results_last_night_edgar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defipedibe/the_walking_dead_comic_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e8382e-f736-40e9-8958-3c2cc01c352a/xesezotadijiziwibadoxiwa.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_87a7e1cce4034922b966e0fe11b5fbcf.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_48a13e85fdc54431af63d1c2e7f98573.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e113559a-d336-4697-a597-64bf29b33474/sda_church_close_to_me.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/dofebiwaxepukuxale.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_411c4c2c0d024c3a903c2fd43ab2b599.pdf?index=trueIn 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_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_01_sfnt_off00011552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 5176 bytes
SHA-256: 585ad30b8bf9446f8751a525fffc2eb3580ba8d359fc3075deb584fc329b9e19
font_02_sfnt_off000126d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D4 11068 bytes
SHA-256: d666c7d1619ff005c3e42915bad7169f0aa56976b482a78d5c45829a654bf038

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