Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29c23a1ed09ee22…

MALICIOUS

PDF

69.0 KB Created: 2021-09-05 10:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d7c8a1580c7d892205157e5c965fd812 SHA-1: 7b9682cd714f43a31c8afbb47e82e93fbe3aeb7e SHA-256: a29c23a1ed09ee227ad9310e1eb5abe3cd243feaa3d6081b2000e1bfe44d5c9a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable link. Multiple heuristics indicate it functions as a link farm, directing users to various domains, many of which appear to be compromised CMS uploads. The embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=transcendental+meditation+pdf PDF link annotation
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/posefunabo.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/6644295466.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/budodulukov.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/wovumosevodavinev.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/flvkmil49d3lkavn5qbha6rlt2/62371374412.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/2b2b8f429dcabbce2be6a737c3d67e65/poturaperutapezesuvagak.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/62753938735.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/lafebatonoxowaziketavun.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/15888542918.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/lijinojuvixofug.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ne2kpsgfb1ku89lrejklle4i9/50657632423.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/mll7p59rag0qp8pshcf3mid38j/27838146606.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/65667632003.pdfIn PDF document text
    • https://bataretak.com/img/files/file/6148411655.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b9666d1b3---61832728787.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16201765499265.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0642aecbe1---bapulubasapozofi.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/44249778303.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/kitewezivu.pdfIn PDF document text
    • http://delve-cr.com/uploads/78804010331.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b257ab962---kirinojarewoba.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/8d4900f4d2ebdd97178ba49083cb4568/zekafunijuzinanoxo.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/furoferijaj.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/dalumonudunatuwoto.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/lg7p0hs9dqokgmq47pdek0gpa5/zakafawipabodedaviwaj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 13780 bytes
SHA-256: c965b256e52ed2d25837f53388e63bb50574ce6561ff44132eb05bed3fffb5f9
font_01_sfnt_off0000d637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD637 10744 bytes
SHA-256: 3c97c5f4cad0c1c8a5b2221dd05e336580e0541239c712d6fddeb98cfa245398
font_02_sfnt_off0000eee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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