Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b4f6059ccf1779…

MALICIOUS

PDF

70.6 KB Created: 2021-08-27 22:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e593d646dce2765af4d0a7b5cd23ea73 SHA-1: 8a781e1d40d8065e8e94077746db08843061c0f1 SHA-256: d0b4f6059ccf177942a8e6d78e06a8b2f46d301b7a554ab7d1f6825cac4ddd40
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document with an action trigger, designed to resemble a screenshot to entice clicks. Multiple URLs are embedded, many pointing to compromised CMS upload directories, suggesting a distribution network for malicious content. The document's structure and embedded links align with common phishing tactics to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=do+i+want+to+be+transgender+quiz PDF link annotation
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/e70424c8d60c5363f6e45155875bbb04/47102960637.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/n9g8iacei04o2rkj27s2uaee8u/lijopajakixixijesexugubu.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pr268o7j4i3rluu3vcl4d4igsm/lodakanibezorizimozenuda.pdfIn PDF document text
    • http://standdominica.org/files/files/gedepilup.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/lupevidozifikapozusivin.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/bb557e96c98d4411c99d0be2a580da38/71446055414.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff496017b3---97111275182.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/retufafa.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/69868977461.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/8b22c85efa03cd9709b4597a6e73c90f/47954405970.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/vajiromepugenotite.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/japuvawizipi.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/5f71a81425c410529ff5e1248a9c2723/seweginexonelipobugawunaw.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/f53883e557520ab21595a8953adfe4bf/pozefupewi.pdfIn PDF document text
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/waziduwafonupim.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/todemovevugusitude.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/099de2d80d9f1f3727afa74be344aa68/bopawonapotusasaf.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/12298624339.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/47387856694.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d6d2ce0e5---92616309139.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/29391361954.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/kegunivurejavazono.pdfIn PDF document text
    • https://bachson.net/upload/file/fajedujekal.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/kimowi.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_off0000b7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00E 10912 bytes
SHA-256: e647c215ed7c93b956a8a56d3713d98f04a88b9c44c43995a2c57ed4fd459215
font_02_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 14240 bytes
SHA-256: 20c30102cc7a1f26d28696767f2b3d2d4a29d5313283f881252c3e85bfadae6d

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