Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6ed18b08f9ad50…

MALICIOUS

PDF

102.0 KB Created: 2021-03-21 12:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7456eeb3341854f22a97720be8204b60 SHA-1: 956510f9784ca27b6b75a6070df6ee875d6bf9b9 SHA-256: bb6ed18b08f9ad507f8a11c2b4dd6f0e905eb9c157822982fff20be1c4bcf7e2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9989

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 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.
  • 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://zajinet.ru/123?utm_term=samsung+branding+strategy+pdf PDF link annotation
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/9268150.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/hjb02gi/66506104882.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/KXZjepi/hit_and_knock_down_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/djcjaS0/32129574103.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/J1Hkig3/58886533075.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/apjehbm/best_cartoon_wallpapers_for_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/Mnjb9id/photo_eraser_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/jz0TgdH/how_to_draw_monster_high_dolls.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/Inxigif/metufobolotikozimag.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/4esabgh/marco_island_brewery_menu_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_6024a44957f26.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/aidB9rL/az_screen_recorder_apk_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/dVOichj/piano_virtual_class.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/yieCKij/pewokekexaragerixodimuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_5fd7a3c768f74.pdfIn PDF document text
    • https://pupiwukonavi.weebly.com/uploads/1/3/2/6/132682553/suzunun.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/L3pijgj/battle_cats_mod_apk.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/xikeg.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/QibidIZ/super_sandbox_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_6022f61b908b9.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/110a7fce-8927-4edd-b1af-330b7c421fcb/41328998531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2c2762-49e7-4580-b0df-8ac5efba4369/kenitotadumos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46aa3691-6830-4a74-a499-2690ec999c5b/physics_book_in_hindi_download.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_off00013a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7A 5676 bytes
SHA-256: 2140384cb8913593d6301bbe49cfc644ccc83993f12f1623ab149dd16721230f
font_01_sfnt_off00014dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAE 11320 bytes
SHA-256: c03f0276588c3028719f922aa8e23fc29ff82bb22cee9758162b335b8c3002db
font_02_sfnt_off00017427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17427 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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