Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c32a4d7dc48885…

MALICIOUS

PDF

76.4 KB Created: 2021-07-02 15:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eb8c7865b58969fa28b7cdb359bf4d3f SHA-1: 5af238a591b4d8a8c12dbc4fe0c49dc1c0b81bae SHA-256: 43c32a4d7dc4888598055201007dcec9f1ed4968f3d3790c829b489a53abf8c7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The document's structure and embedded links indicate a pattern of luring users into potentially harmful interactions, likely to extract sensitive information or financial details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://glbtrader.com/userfiles/file/82597630405.pdf In PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6ef956cc8---jibof.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/66da82de73e8acd0390bc304464da2b3/vujajowu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/877up8qcbgopr3a4qee95ui33c/wuxafojojuzigeloponumu.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b09fdc35df---52135901664.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/25817021925.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/6279377827.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/36118878233.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/8294266255.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb67262c36---96289023444.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/17671267441.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/dbbcd4aebfe6c06a983d6ca53f859b11/ketezisekabubetakekubode.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a72f94bf20f689dbf3befa17a459a50d/satujupujenedujomivivivid.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/komor.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/parisijin.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fbba70635---62777637419.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a12dd1bef5d3aad77ccf9a5dc24a78b4/jadowajojopufepeximavime.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e74518a71---waroroki.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/25232960871.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed5160996a---pariguwepodejawibokud.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/zaxisifijelex.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/mefutidapumujode.pdfIn PDF document text
    • https://keongracun.org/contents//files/xuzamupirupimokatasaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=blood+mobile+donationPDF 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_off0000c7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 10332 bytes
SHA-256: 70927c60b81b8e5ca24052e852b8e5efb4a9c51dd9046710d511600bc5319b99
font_02_sfnt_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 17204 bytes
SHA-256: b737fe6055c0b01f9681336cafbd8b06c4033f94c98bc01bd8ba86fe4d3ba396

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