Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5a700178e61194…

MALICIOUS

PDF

87.1 KB Created: 2021-03-20 16:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 43782a177e9c0c8345e2e0a03f6c8519 SHA-1: 1e659efeacb045ef5d4cddedbf5a8e91d179ef4b SHA-256: 7e5a700178e6119493953b3a9570dcf22edcbb13d8210c5c5cec67674b8ec305
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a significant number pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The primary malicious URL identified is https://xezojetit.ru/123?utm_term=ffxiv+glamour+plates+guide, which is likely used to distribute further payloads or conduct phishing.

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://xezojetit.ru/123?utm_term=ffxiv+glamour+plates+guide PDF link annotation
    • http://fasoxuxesatilu.sportsontheweb.net/wewabexux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5feed917a7dd0.pdfIn PDF document text
    • https://cdn.sqhk.co/mevutaxisut/fHhUbie/26447634231.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/hhcibjd/demographic_transition_critical_thinking_activity_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_5fee3d6f6a7bb.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/ajbsGe2/47306178349.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/curse_of_the_crimson_throne_interactive_maps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5fe6038f775f3.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/learn_english_through_story_subtitles_english_level_4.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/d0KhjN9/28432110020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_f45b70abc443409f84441883b975d3f0.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_957ed8c5dec14e8d8689a0852fb40c77.pdf?index=trueIn PDF document text
    • http://jabodegodonirad.atwebpages.com/nikitonubele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78e1675-a1ba-4685-bf31-24890ac43056/road_to_hana_stopping_points.pdfIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_001662285f5646fe85897dd0ca2a0449.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/760ca340-097e-49d0-91e9-4b67edcf151e/what_does_the_idiom_hard_as_nails_mean.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_d4da7919226044c0bc6fb8c420ac1c2e.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_cfa82460d06349c68bfc4c72b5df30ac.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_80fdbf44067e48b489699982ae497b04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9233f4d3-5eea-47aa-bd54-4363cb2bf4a2/what_can_blood_type_b_eat.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_off00011348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 5444 bytes
SHA-256: 94f3d326bef89b7a0797776103784748b545cb44588bc0334db926d3ed00d994
font_01_sfnt_off000125ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CA 11604 bytes
SHA-256: 073eee9bc6b65e84d89d50bb36be29cbb541ec655d614b4fc9e273ea8237d4ef

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