Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efeefbc976a8ef8…

MALICIOUS

PDF

85.9 KB Created: 2021-03-24 20:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4032a2a4ac2f5b4f43301bf52adbafc SHA-1: 9adc6b1cff1665a132d90909ee75f83c73ed86ba SHA-256: 3efeefbc976a8ef86fc74b906f71a0c4557a1ff72c4ce88c81ac11788a24f136
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/123?utm_term=boom+beach+hack+apk+android PDF link annotation
    • https://cdn.sqhk.co/fumamimed/hbnohgC/57027523600.pdfIn PDF document text
    • http://atlas-copco.su/al_kitaab_part_2_2nd_edition_answer_keyq7ql3.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/aristotle_physics_book_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_600f181f5c8a6.pdfIn PDF document text
    • http://nicepics.xyz/xogonap0i3o.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/glgfvji/71982625736.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/lasexiduvula26hip.pdfIn PDF document text
    • http://barberking.best/the_house_of_the_spirits_summaryowr6i.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/xagemuvoginovugekige.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/iF0hbid/sakura_blade_2_apk.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/eroso_e_assoreamento.pdfIn PDF document text
    • http://lastmarkt.ru/gender_pay_gap_reporting_deadline_april_2019xa9lt.pdfIn PDF document text
    • http://tiwegopoguxuzu.mypressonline.com/flat_rent_agreement_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380675/normal_6001010e02f96.pdfIn PDF document text
    • http://shothard.site/36440012901wb93s.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/iijhgke/lokodeduxiwuwole.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/GaheifL/20780413369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/262c798e-2ed1-4914-8e42-d73696bb97c2/samebeborirunatisunedemi.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/radiometric_correction_in_remote_sensing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4769e47-4b42-4ed6-88a0-ae76ff302fe2/los_juegos_del_hambre_sinsajo_parte_2_sinopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc060fc-a039-44a5-b69c-e615b132efea/wallpaper_hd_images_2020_apple_event.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb27fbe-1206-46d2-9680-e60a0fa2e4f5/cloudy_with_achance_of_meatballs_cast_barb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 5356 bytes
SHA-256: d31ecffae7b04fcb8f5d867e229f78ab8e4fa898327dea6e19f0ec5f6a7bf945
font_01_sfnt_off0001015f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 22984 bytes
SHA-256: 7263a0a0884b42b7091e21cc17ff2b6c53d7237ea6d75f889d5118ccd838eaa2
font_02_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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