Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff565eca1a6ce508…

MALICIOUS

PDF

80.9 KB Created: 2021-09-06 22:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be187a87b07a30bee8bd1f95e6978fd5 SHA-1: 3e44d56efbfab7e29a0b969564f4099c3d0250e1 SHA-256: ff565eca1a6ce50856047d898e946f866871f8590e81a61555daa3d510442643
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to compromised WordPress sites and external URLs, with a specific heuristic indicating a 'Payment redirection / bank-detail change lure'. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://laborke.ru/uplcv?utm_term=basic+accounting+entries+pdf PDF link annotation
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fed2fe578f---70278914167.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/mavamogegazugasubod.pdfIn PDF document text
    • http://platcometals.com/images/file/gufozimagavapivi.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/wubufusajugiworemapob.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/xisukimagawu.pdfIn PDF document text
    • https://eberli-medical-supply.ch/userfiles/files/kisota.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b34cd6aa13f---wirinokukob.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d1e05917876680e33398abcbc94656c9/40190270136.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/65653988532.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/89542948654.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/4c80e005d11fe674e64f72bb2610168a/dokafikuwa.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094519d8ad0d---19388504434.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/xasafelelaw.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/7940926360.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/c3to0g2vt27lkumslqbmcv7vq2/kexejapugimalog.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/lidevadipamitoton.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/nogesotemorimesu.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/43513453814.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/9c1d17601f714d8dc990f5ea50f69274/47258439615.pdfIn PDF document text
    • http://staropolski.net/Upload/file/16218757917.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/45306174843.pdfIn PDF document text
    • http://biomisszio.hu/tmp/2144698340.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/mezugizabikomasejiloru.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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 17256 bytes
SHA-256: 27abf23f4d161becc9dc96988c51c008f3011b2595b25e57f91db0c414ceb841
font_01_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 10900 bytes
SHA-256: e9dbfceab50ffce6212ec45ea63a5f019667efc2bdb37cb36f5902368adec6b8

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