Malicious PDF — malware analysis report

Static analysis result for SHA-256 f380d70a0e9359a9…

MALICIOUS

PDF

111.1 KB Created: 2021-03-23 15:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 504729a3e28262afc2751b287609bf48 SHA-1: 72d55c5d82e54870557643c969b178255ce90975 SHA-256: f380d70a0e9359a9ec162f742c9a7da2da318477afc81a36161b27f53bb1b752
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The embedded URLs, such as 'https://dugedepap.ru/aws?utm_term=object+oriented+programming+tutorial+javascript', further support this, pointing to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/aws?utm_term=object+oriented+programming+tutorial+javascript PDF link annotation
    • https://cdn.sqhk.co/nodujugebi/Uij8Nge/warlords_of_new_york_expansion_worth_it.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/Lgfjavc/6ix9ine_runner_pc.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/61144552797uda53.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/9hjib3I/tmnt_portal_power_hack_apk.pdfIn PDF document text
    • http://getcabinets.xyz/47126538276pd5gm.pdfIn PDF document text
    • http://agent-ritual495.online/why_is_my_amp_light_red61h8p.pdfIn PDF document text
    • http://soul-felt.com/67648812417sbzf1.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/1aheib3/the_wolf_among_us_castellano.pdfIn PDF document text
    • https://cdn.sqhk.co/pugipepa/gRMKgdE/98751255934.pdfIn PDF document text
    • http://believes.space/what_is_the_social_construction_of_deviance9s10u.pdfIn PDF document text
    • https://cdn.sqhk.co/loxufore/cgfUcib/shooting_games_for_android_2018.pdfIn PDF document text
    • http://losinglotterynumbers.com/zomefiwufejtsiku.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/agejw58/88739230738.pdfIn PDF document text
    • http://subfamjtii.site/race_real_cars_onlinehf7et.pdfIn PDF document text
    • http://babbieshop.ru/harry_potter_book_5_chapter_9_summaryo0vmo.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/bisiku/avatar_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/chinese_characters_textbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/how_to_be_a_bawse_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/is_wwe_2k16_available_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7264a4-5223-40dd-88ea-f5a28a8347a0/duchess_of_malfi_characters_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54eebacf-4f07-4657-824b-1c1587e98575/the_waters_of_babylon.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_off0001738d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1738D 5696 bytes
SHA-256: c5dec0aa010c719af3f0f6bb7d20148f69932473e046d28679164c2838ea434c
font_01_sfnt_off000186db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186DB 11508 bytes
SHA-256: 5646318e9f14976f97a0bc267a87d929e95aa3ba4850606ff6ab3247ab75e028

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