Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fc75b20eb60fa6…

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 14:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: baba2b1cc942cac46894b4a4ab1804d6 SHA-1: 23a249498041a04c39849661a74672bd47494050 SHA-256: 93fc75b20eb60fa6375e0f771567e1873da1d4fb04b30aefbca49e64fd68514f
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 0.9994

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://gimoguvi.ru/award?keyword=clasicismo+pintura+pdf PDF link annotation
    • https://cdn.sqhk.co/wobimore/eoji6Iq/dual_monitor_setup_with_laptop_closed.pdfIn PDF document text
    • https://cdn.sqhk.co/liwijodi/idijjjW/zised.pdfIn PDF document text
    • http://reawolt.online/690098968419rkqy.pdfIn PDF document text
    • http://pestore.pro/zunemawijurotawiwaxqs5.pdfIn PDF document text
    • http://remastacer.com/retuzinijikqb4n0.pdfIn PDF document text
    • https://cdn.sqhk.co/fabetojowuje/gdghVic/steel_ball_bearings_bulk.pdfIn PDF document text
    • http://zdsshop.top/16457043065p288h.pdfIn PDF document text
    • http://familyit.info/ejercicios_palabras_agudas_llanas_y_esdrujulas_4_primarianr6dd.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/f9gdgg0/megepirunazij.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/nhficie/movefajabezirusi.pdfIn PDF document text
    • http://love-cosmetics.shop/84242136131mmdy7.pdfIn PDF document text
    • https://cdn.sqhk.co/kixalixu/iPgh8JG/pikowiz.pdfIn PDF document text
    • http://liolika-rsya.ru/68745494275qtjs.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/jsaiaje/fotezujijanutevakepip.pdfIn PDF document text
    • http://gbo.guru/61393391044wn7ra.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/uiaBX0e/all_in_one_social_media_app_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5ffe3100f34e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_5fdb30c98713a.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/jhjfhgb/super_brawl_universe_mod_apk_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_5fe7eca9e82c0.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/22d403bf-e61d-4719-8eaa-5bd2da477a7c/needful_things_store_oak_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955bcfed-6ce7-46dc-9f41-6632fb4cc991/the_tragedy_ofthe_commons_hardin_1968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe77de5-0631-465a-aa90-7bca757e344d/how_to_calculate_radius_on_google_maps.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_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 5208 bytes
SHA-256: 0aabffebc949fa8f25b839cc7c13cd163256e6d009e56c9981a5b307e04d72ea
font_01_sfnt_off00010a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A76 11984 bytes
SHA-256: c6ce57ef65674edce70613ebeb4a79ace762161c5341fc4eb6dc41829d050234

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