Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33d9b0a508ebecb…

MALICIOUS

PDF

92.9 KB Created: 2021-05-07 20:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2bda68af1a0e0c34bf5caab7136fa74d SHA-1: 57579c731a30794841e11bd75d7b9882550f83fd SHA-256: d33d9b0a508ebecbb80b7e33e64d495ff577c6467a6e239e2ed7b1d6f4bf9fad
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 0.9993

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://golowaki.ru/strik?utm_term=how+to+build+a+truss+bridge+out+of+paper PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/gdjahf5/download_football_manager_ultra_2019.pdfIn PDF document text
    • http://iglivesupportteam.com/clash_of_clans_latest_apk_apkpure47u00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fe74f62b66cb.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/2008_ford_escape_abs_brake_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fecb191d74e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_60050308271b6.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/egcBvQq/91623437713.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ffe7e73856f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_602de4b573e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_6068ae71782bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_602c0452d6212.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/kN6dhdY/basketball_point_scorers.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/aaa_auto_insurance_policy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_603454cf5f291.pdfIn PDF document text
    • http://unityfree.xyz/womapalotuninikuraxikunj31xy.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/286e6887-e2db-4bc9-adbd-76d03a3ae764/ejercicios_notacion_cientifica_2_eso_con_soluciones.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/50291393372.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/30378672861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a763fe8-d933-4998-b237-4b467b9495f3/hp_elitebook_folio_9470m_drivers_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdcdc2dc-38b8-4835-bc9e-d85c61e2ad02/35200342823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0469f77b-eeef-49b3-b408-5993346588eb/xosuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a8f635-fed9-44c1-b5a4-94a4a6b9a2c6/78000371981.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/organelos_celulares_biologia.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_off00012c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C31 5404 bytes
SHA-256: 2cb6363f82e74c4bf5097544854f962675f839effe6b79615eddad8b24abe822
font_01_sfnt_off00013ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA7 11456 bytes
SHA-256: 8898e387754566ba37b1b3195cf56339de17767bff18be48018222f081e726a5

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