Malicious PDF — malware analysis report

Static analysis result for SHA-256 149108b8a84f7acb…

MALICIOUS

PDF

87.6 KB Created: 2021-07-14 09:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 48324aa9fd0e54c75b553d626f87ab7c SHA-1: d0f87348b8fb4418c3d7eb4cb33da11ecf165c8e SHA-256: 149108b8a84f7acb0bbfb9742d3ff49eb98f6ce2fd64650fb8e0f52192c76a1b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern, though the document body was too corrupted to confirm specific text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/380e5e6f5a3f7e66af4773ce2145366f/pozimitodagilada.pdf In PDF document text
    • https://bepxuyenviet.com/upload/files/85571319141.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/kifiwodudufejizagepuzesa.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9542313f---20308825369.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/zudavukobutir.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/lubopunulatikin.pdfIn PDF document text
    • http://beiks.info/public/file/13229177151.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee2be4617e---42686292227.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab299378cc3---84337149554.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/940016c6e8ed000fed759de5595fd9a5/sagekupewuxokakobu.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/29478446578.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/84966899324.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969572b5ded---vetiva.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd2a488701---nolotatotaluduwuxiwax.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca003a061b---patufikaxe.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/nikotawonopesuserupizador.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/litidenabonib.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///zasofuxije.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/71512334962.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160940d688011d---38992893020.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4e1dcd6c24e13606400c73a2557e3874/58518249591.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/388d38f0601866920ea836028db81c48/rapijinilosojilog.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/zozawubukirobadesup.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160883789c0922---lurirenuvipafikejaxajul.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/19ed26c4fa7da08de85e4da1fbe2d491/batomamixigataf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=tycoon+in+swahiliPDF link annotation
    • 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_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 19424 bytes
SHA-256: 6f356c5ce262b73a91b1e640c796f4e665d930a11f6a3487b2c9db4d2551f65a
font_01_sfnt_off00012291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 10160 bytes
SHA-256: 7849c22dfc1a75913c42b6c2a1e91a44e3300958f93bc06561c7cbe4824f5c98

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