Malicious PDF — malware analysis report

Static analysis result for SHA-256 beed93ff1f230391…

MALICIOUS

PDF

88.0 KB Created: 2021-03-18 14:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fbde269b06139df3b73211fe7025a90 SHA-1: 51f579fe7b9472c2f87444b30b9b1e9183bc1a22 SHA-256: beed93ff1f2303910fddcea3e21f14608b49b46d517faf144ca7d7067fc5542e
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://druttle.ru/wix?keyword=ap+calculus+ab+first+semester+study+guide PDF link annotation
    • http://aarbuz.space/catie_turner_prom_queen_piano_sheet_musichumuh.pdfIn PDF document text
    • http://korecos.ru/58482200804qa3g3.pdfIn PDF document text
    • http://myfirstsite.xyz/334689773640alg7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5fdfd7cc3272f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503584/normal_5ffca53b3911d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_5fd38c9c2083f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_5fda5230d4401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383679/normal_5ff2f05db7a12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476126/normal_5fcc739ce7e88.pdfIn PDF document text
    • http://gatorama.site/ifr_6000_trainingivscw.pdfIn PDF document text
    • http://finansi-7.online/dining_room_sets_cheap_free_shippingw8ra2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_6050f1a139b4f.pdfIn PDF document text
    • http://philonio.online/adobe_photoshop_cc_advanced_tutorial40u4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_603ffc3b1e16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_600c9fcc43366.pdfIn PDF document text
    • http://uaregroup.com/aquaterra_verona_spa_manual01wgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_601bbb28afd90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473642/normal_5ffea6be6cdcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e5cbf132-af38-41d2-930f-0662c0efde48/fadokawunemudexatevuxero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9560c13-7356-4d87-84fa-3859b75490aa/sotunevamupoleduperekul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bce051-1f3b-4f36-b0fa-f1159282aada/resumen_de_cien_aos_de_soledad_de_gabriel_garcia_marquez_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630bcc12-d6f9-4ebe-ac88-cf6037c3eb67/will_eisner_how_to_draw_comics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 5372 bytes
SHA-256: 4bb6beb5e47b6bd11f92e6818c6386054ae5560eb45d7f464fdb673e991a3abf
font_01_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 11940 bytes
SHA-256: 9959b6de4f94d5ef1c576464b1dc2190560082a36eb3a9cc4e2486ff0c1fef7c
font_02_sfnt_off00014438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14438 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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