Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b5e1eb7de2dd41…

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 07:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2ee1f2d8041a47488769c1ece9d6b635 SHA-1: a27af9e1cfcd7b82a0c71f30ddd61d95ae45472c SHA-256: 69b5e1eb7de2dd41bed3950181eeef69ad6dd26e3e62d4d3bd564b063f0dcd07
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=odyssey+study+guide+questions PDF link annotation
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a138b4cb417---5920392768.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/4c3e6af186a2dfccb518a0d0559d06cb/zepazaxufeb.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/lufabolet.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0bf415e2c---dopopudarusigabevakikaw.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/1bht0ur66fai8k0fiaia04jeqv/81212144902.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160826d74742e3---13810958364.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/40130190388.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/dewijopu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801f64c3442---xezit.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/43971921590.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/3994099148.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9562696dd9---botizetudubemizew.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608cad9fb5236---89522250495.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ac689c3a213---65262879851.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac46dc69328---92200028330.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/249081471.pdfIn PDF document text
    • https://bselink.com/userfiles/file/90239317587.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d3acc2338cf6ae1121aa2d222055690/14079792094.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/lowepolimeso.pdfIn PDF document text
    • http://fotossc.pl/_files/file/63975817693.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/1f59a2d3737603966ea175f6f08aefb7/88125277271.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e1f1b4d5---rarajopexafuwijenuval.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5bc9c70c3---39341101274.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab784fdb739---22886891620.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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 16924 bytes
SHA-256: 0d665169fbc49d58034e30076c229a98308724feb767ecde701da637e0094015
font_01_sfnt_off00011d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6E 10500 bytes
SHA-256: 9196beb9b75a0ce57ff2b1b796fc31deb22833f42e0229437ceffcc49c87a1ad
font_02_sfnt_off000134f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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