Malicious PDF — malware analysis report

Static analysis result for SHA-256 8247bb0526ea6179…

MALICIOUS

PDF

81.5 KB Created: 2021-06-07 04:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce3433e3adf3d9f9bd55e169b7ee4857 SHA-1: 1157773454d0081ca4454622dc96b464fbbefbec SHA-256: 8247bb0526ea6179e4d8d6b13a49183caaf6dd17c9a1d38536a33bf74ad949dc
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 0.9998

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://fokemale.ru/123?utm_term=conflux+heroes+3+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce37884-80e9-4f42-82b5-85d82379abd5/mepol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab1906a-fc5a-4e07-99d5-0b26451ea1df/lenopuxonumed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d31866-f52e-4936-940e-fe65776d8f24/what_are_some_of_gods_miracles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c569548-80f3-4551-9864-b5a4014dfa68/marathon_wr50m_watch_set_date.pdfIn PDF document text
    • http://xuladejuzor.pbworks.com/f/89924985511.pdfIn PDF document text
    • http://nalujoxerisi.pbworks.com/f/kitoxidezokibewexoj.pdfIn PDF document text
    • http://tovemubu.pbworks.com/f/how_to_pair_beats_earbuds_to_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce4e5b6-528c-4476-a873-6bded4c09dcb/who_is_the_richest_person_in_nigeria_2021.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/what_are_the_different_story_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b03f4e-da6a-4d07-9c49-ce12e3c659cd/war_horse_play_monologue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c6ae4b-3a2c-46e4-b986-5d58db018c67/motorola_walkie_talkie_t600_h2o.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89664e8-929d-4cfd-bef0-84b11d0a9fde/speed_queen_commercial_dryer_master_key.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/73903976900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44aac552-9701-4b29-902d-dcde9b82f4c2/36867402814.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144480486/how_to_use_polymer_clay_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc18a0d3-3c29-495f-b49f-eedf19267c0e/thirteen_reasons_why_jay_asher_samenvatting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fbdb20-c360-4229-b667-c421ce3cb965/55689636468.pdfIn PDF document text
    • http://pejokawigar.pbworks.com/w/file/fetch/144760893/gekimewatido.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_off0001024a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024A 5096 bytes
SHA-256: ebdb29fdbfde03370c402e9a5555d28fb3d172f3f8ec18399362d6a6bc58f147
font_01_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 10872 bytes
SHA-256: 182fd8cbb432e1f073c54db1741221932b55118be5c9eccbe60a58920b84f3e2

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