Malicious PDF — malware analysis report

Static analysis result for SHA-256 954918fc070b9755…

MALICIOUS

PDF

80.5 KB Created: 2021-03-13 16:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72ce9074b2285df15b797c6b471bb82b SHA-1: 59414aa85eb1914e3bb3873e3a72a742a9c9ae5e SHA-256: 954918fc070b9755f89d3b120e8f0e52b5d4cd8bed0e2df40c7d7c732b5416bf
186 Risk Score

Malware Insights

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

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=root+chakra+meditation+pdf PDF link annotation
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/limabofisi.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/ngeXfge/piano_tiles_3_no_download.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/f7a8b91.pdfIn PDF document text
    • https://lojimosaxamigek.weebly.com/uploads/1/3/5/9/135976806/7d2473943d16.pdfIn PDF document text
    • https://vojanaxopij.weebly.com/uploads/1/3/1/4/131453451/kewizeneselubud_niwaza_veguv.pdfIn PDF document text
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/7889022.pdfIn PDF document text
    • https://lajogaful.weebly.com/uploads/1/3/4/4/134481829/suwop_mefofepiki_tepapipunadiwel_wabevale.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/bXohhih/vexekerabelekagexon.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/5fe008bb-cbbd-4918-a811-e5d8d251e043/but_how_do_it_know_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915f9161-bea6-4127-b042-825e40a85e07/different_types_of_fabric_materials_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3680df2-3c5c-4263-8596-c0a55aef4128/is_papa_johns_garlic_dipping_sauce_gluten_free.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_6bf765fe12fc47f3a5f94c3fd7df31c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d312b150-5ec8-4885-b06e-59dfdcf380eb/how_to_work_iworld_bluetooth_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7eed28-c664-4e1c-8f4f-e11b96cabb29/como_saber_qual__o_meu_orix_de_cabea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5007c279-ddcf-45a0-a307-53bb40461301/pioneer_avic_x930bt.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_59b63cca6cee44528c5adeb27536fbe3.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_d158fad96d7f4973b82aae47a6de4a95.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_1904b2aea6e049748fe736cac43d5247.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0c548b-e3a8-468d-b236-93f73acc7fea/gmat_practice_questions_and_answers.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_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 5256 bytes
SHA-256: ad7451e848b55a006405629544b7e5dcf568041ccc5f468bb2d87a5098a80129
font_01_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 11392 bytes
SHA-256: 30caf5ec1d94584f562fed0f0ebf025145891dd48b05d911978a0e570f156883