Malicious PDF — malware analysis report

Static analysis result for SHA-256 92feef47adb3a2a5…

MALICIOUS

PDF

90.8 KB Created: 2021-06-28 00:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aeb685fd7d6d80e6fc777130a1cd3fb4 SHA-1: bf68cb87ac3d53ace3e770695f78a6684689f74a SHA-256: 92feef47adb3a2a55ce9b251aa43a3bf5b10a9283bbe5c654ca49f9d5ea2bf9e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing lure. The document body is heavily obfuscated, but the presence of numerous external URLs, many hosted on compromised CMS uploads, suggests an attempt to redirect users to malicious content or phishing pages. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or fake billing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=hounsfield+ct+scanner PDF link annotation
    • http://c-amc.com/upload/files/dulemajujabawifapifatoge.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b8a24ef0---tosoxolutufobaroler.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/lazamag.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/votibibili.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/2e1803d2c879ca070b7021f350808857/17310375602.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/wopivib.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/3916600195.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/dbdf4d28d101e59ce85d9adcc79fddb6/29090496492.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5ff104526---modavowizoxurax.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/66259865347.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/49780274929.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/pukojowekusipozugap.pdfIn PDF document text
    • http://goref.ru/files/file/84274058687.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/kawopezimi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722fc724dda---57435721482.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/53d29bfb034ab9e1eb7bfd06bded4d8e/1118478462.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089690c624b6---16842141467.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gekrf3nb537sqas4e61v6dhhj3/kedopapepukefe.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4790b7f5d---metudutorub.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/90697187509.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966e7f36841---85979451773.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c3ac01c38---95765426073.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/84964511563.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761d3ccf71e---59847168147.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_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 10560 bytes
SHA-256: 95e46f2b0ef536bc6c330b75608ec79ec85ee6b63b9b46ece5a6e6ade41e7f17
font_02_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 26416 bytes
SHA-256: 422ffa79dde4a46da4f91694876c76c6f709fad000260aa8dc235d85bb20b143

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