Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbf124bf253d226…

MALICIOUS

PDF

79.2 KB Created: 2021-09-19 07:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f97c37433f96a63325f0f88155547469 SHA-1: 6c95ad225f3bc603aeefbf6e440c40472ff8fd85 SHA-256: afbf124bf253d2267e757a4c1780bd2b95249bd5ca87608624be3e49da8e74b4
184 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document likely attempts to trick users into calling a provided phone number, consistent with phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shidoremicrosys.com/media/mukuxixinadizimira.pdf In PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131504020590---pawatesoleginapifarev.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613510e7bcb03---40157711411.pdfIn PDF document text
    • http://airfa.it/userfiles/file/lulilezekurumozazama.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/lewemivafedezepebiditex.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/1153384968.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/vikejivudiji.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/57633990268.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/xaxutuzaluro.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/55118977185.pdfIn PDF document text
    • http://eternoohydro.com/d/files/sekuvevidukadonipusi.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/85938212507.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/losamita.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/lugexan.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ee9da409191a5aa3613805120c0707eb/jedefalimaruwa.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/sanemujozikufomaso.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3f9b72669457c0faa16bda3448530586/moposuxedosijipuxotuzupo.pdfIn PDF document text
    • http://synfarm.com/upload/files/filemurorenazigulapif.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/dexomodufevatubejom.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/19539340593.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/muzemudekep.pdfIn PDF document text
    • http://ipublicity.cz/data/file/45055981171.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312230cdf95---32323538416.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/botisipefuwijave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=photo+viewer+android+tvPDF 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_off0000cfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 10284 bytes
SHA-256: 44168e23f07817bbe40d3e4ed7bb78bc3eb1a8e639792cada14ebf179f72e333
font_02_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 18440 bytes
SHA-256: eac8833848ed97b2f363b71e35c2ff45f97917f15e64ea575f6aa4e246f30f81

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