Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7d0aab5320274a…

MALICIOUS

PDF

66.2 KB Created: 2021-06-11 03:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c5e6b3d58688a49bea85bc6bb2584a5b SHA-1: 0480407be86657080eadeb5faef5f42a7a9e6021 SHA-256: 7c7d0aab5320274ac5f2ca50553c6b3890fda853b238f2d1c0c0cfb98ea5ea43
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to link farms and disposable hosting, indicating a phishing or scam attempt. The primary URL redirects to a page related to 'lords mobile generator gems', suggesting a lure for in-game currency or cheats. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://irlanc.ru/pbw?utm_term=lords+mobile+generator+gems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391915/normal_601717c79f214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fcd5666e0bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_6052a42449b4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_6009069c0fe48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498366/normal_6041cf09ce1ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joromonepa.pbworks.com/w/file/fetch/144894921/80900680862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9d6b48-90e1-4d7d-9f14-de419538e0be/logo_modernism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455fb1b4-2236-4635-90f6-8448decae4b5/update_tomtom_maps_for_free_uk.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/w/file/fetch/144669759/refugabugeb.pdfIn PDF document text
    • http://vefubop.pbworks.com/w/file/fetch/144971130/losorevasem.pdfIn PDF document text
    • http://tewabavuxate.pbworks.com/w/file/fetch/144781305/taluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c9126a-59b5-482a-802b-636c08bec09b/halliday_fundamentals_of_physics_10th.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/bootloader_check_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39fa6ca-6ef8-4508-9950-17aa2b79a30b/what_is_the_fastest_side_by_side.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f56a8be-091a-414d-832b-bb99b5c9f4a5/lebozunegasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab4b75a-92ba-4fef-8565-14ceaaf6cfc6/xubize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5771a714-6c2b-4b99-969e-bbe96d900562/xalekaxuzukewabafosopiti.pdfIn PDF document text
    • http://kakewizajupe.pbworks.com/w/file/fetch/144596949/vito_goedkoop_bestelbus_kopen.pdfIn PDF document text
    • http://pikalunik.pbworks.com/f/el_principe_cruel.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/w/file/fetch/144579540/2976963198.pdfIn PDF document text
    • http://zeladejan.pbworks.com/f/50754122101.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_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 5228 bytes
SHA-256: 09e660fd9fb3c356af3403b21e58bd1cc2e88c4d711523e5aa999f910d742d99
font_01_sfnt_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 9416 bytes
SHA-256: 28d4fbb2aaf9dc48b958f5383b7ca8533173dacb674d81d656e9815132fa4a3f

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