Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d013f79af5a2f02…

MALICIOUS

PDF

81.7 KB Created: 2021-08-21 05:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e7b2da31802bd6944c44b4d22576fb8c SHA-1: cd2deb3362f187067d251cd79f58a8dd8867705c SHA-256: 5d013f79af5a2f020dc803bf3acca06f3eab0c75524ebcb902ae001341893c9c
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number for support or to resolve a fake issue. While no scripts were extracted, the PDF structure and embedded URLs suggest it's part of a phishing or scam campaign, likely aiming to steal information or money.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/v57o7mmbh9gdr200vjnkqj8sn3/simufulu.pdf In PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/6634948250.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/33682086404.pdfIn PDF document text
    • https://invest.pl/userfiles/file/59140561232.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/77df4416c84afe90bcfb6ad8286e8373/2553658876.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/bewadefoxujapevoxagub.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/49362404502.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/27403511491.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/6fea1476cfa306aa473f659e77215a08/pomotadek.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/87955124857.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/93974814899.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160761a4345af1---38560018209.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/tabupa.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/70811460089.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/25576979016.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b37311a34b0fc356273cac37d5da5249/20777171345.pdfIn PDF document text
    • http://trekkingsapatours.com/upload/files/3183508739.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/34749f347e8902f84c25810fb9d781ea/nuwavunabedusigitupofo.pdfIn PDF document text
    • http://labsshop.com/d/files/xefijuvikajumi.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f6a62431270---90352380758.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/83547800561.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce93579022---50121708680.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/vizudigusut.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611d5fd34a376---12369081178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=chase+increase+credit+limit+onlinePDF 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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 10668 bytes
SHA-256: 89761a01b173f6a9fe8ba06bea26355cea5753a95cd671d27e90e4fc4b92b7b2
font_02_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 16196 bytes
SHA-256: 54487757afc2c88e70047c37ce5d7722077cbbcaf20919d89c26be2c90fe7b04

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