Malicious PDF — malware analysis report

Static analysis result for SHA-256 f106085fa1a4666c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 07:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32574c3a30620b95c6b4bc1dd5d45a4d SHA-1: 77ee03cf3bf6b2da48d10be3f0883198e378a472 SHA-256: f106085fa1a4666cd8746d268b9d9efe7016c4b62a502ecf2c6a3c0569d6b08e
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 0.9996

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://resalured.ru/strik?utm_term=are+the+firm+workouts+effective PDF link annotation
    • https://cdn.sqhk.co/niporatibu/fiepSCF/crazy_cell_phones.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5ffc8ca26c85f.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/gEyifpx/sdge_san_diego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_60319a0f6f1b8.pdfIn PDF document text
    • http://santand-es.com/a_little_history_of_philosophy_warburtonr0dof.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/jhgRPZa/96949127547.pdfIn PDF document text
    • https://cdn.sqhk.co/lujipalaf/jhhcjjh/bavodubigonije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_601367bd4fa5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_5fe818031490e.pdfIn PDF document text
    • http://freefire-gifts.com/bts_fake_love_song_musicpleere8khi.pdfIn PDF document text
    • http://loduxoxoba.22web.org/beyond_two_souls_chapter_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_6015857284a52.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/41b09eba-9b8d-491c-b2da-5ed58ea1209d/autodesk_fusion_360_black_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeae46d3-2b54-4ffe-a9a9-87e68c169792/65396768954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b74e622-0be9-4691-8072-b621e8aff9b0/kedawagiloxifuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a3d89e-2ec0-485d-8bfd-e9277a66aeed/what_are_the_theories_of_justice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148af88b-c9c3-4eb2-bd5b-c0080a28c279/thetford_rv_toilet_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68d407d-7ca7-42e9-81fd-fd2936859f5b/oracle_pl_sql_free_online_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3f067d-6324-48ce-aee9-c6c558653e0a/3235415871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c8fc3d-1449-4ab2-9c51-94d05780c26e/great_american_songbook_foundation_board.pdfIn PDF document text
    • http://mexawuzemogo.epizy.com/97960083057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef601d63-ebf1-44ba-94ca-966be9ff3611/percy_jackson_and_the_lightning_thief_cast_marie_avgeropoulos.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_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 5084 bytes
SHA-256: fac5d9bca2c53b18a7467616cd46811356462dcb1722d6484b6651fc66e29637
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 10640 bytes
SHA-256: f2bf18d54cf39c154b87ca03fcb6e6e78f7f05afc8c072e76e24603c0555054e

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