Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe4e4362f972aff…

MALICIOUS

PDF

95.2 KB Created: 2021-08-14 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8b3462b61845286acb7266f11b9123cf SHA-1: e452f5ef2f9d954dc4faa20787f4b6aaabea96c2 SHA-256: 1fe4e4362f972aff461356e4aa6609c2d8574e05fa0c7793a554aa51ac908327
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of numerous links pointing to compromised WordPress upload directories and disposable hosting, combined with the 'Payment redirection / bank-detail change lure' heuristic, strongly suggests a phishing attempt. The file likely serves as a lure to redirect users to malicious sites for credential harvesting or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://cructi.ru/uplcv?utm_term=can+you+trade+options+on+fidelity PDF link annotation
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e84d78af5---lufomenepadijiwe.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/91683153994.pdfIn PDF document text
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/80431365224.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/sijikazimokotakogebibim.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mcj5b0t3r9dvqi04ra9lpdbqi9/modedalon.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7112c470a0---lopebagawuzafo.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160885f2d6c032---jajiditarepobokiden.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/dogiralamileseb.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/30a74a57670c24f5a4a4eadf757b00bf/depoxifud.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/46013158881.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e3aa5d0b25827cc160ea0b2fe820670f/88155270050.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a115b7a76---ridib.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/43934116197.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/ziwatiposora.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/gamivirexa.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1bb730261525dcdafaf851ba73a9e705/bunufejarugevetenufu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079e61769841---guzesupilijanemi.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/fuvitenoxavinegejopiv.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/23315052741.pdfIn PDF document text
    • https://stopserv.ru/files/file/simetutas.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b46377cba4b---lipeni.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/55530996915.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_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 17328 bytes
SHA-256: 317dd045e3a5c0c24874297386bb35237260bb04c417f5c84e456a23e127cda6
font_01_sfnt_off00013ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DB 10736 bytes
SHA-256: 4b0ae4c45078cf763d33f57f6cd10c1aeb2540614b5011c62bde0030ed73a843

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