Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e3c6312ec4cbe1…

MALICIOUS

PDF

78.4 KB Created: 2021-09-07 15:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8af7d2b5fa175f73543d2493e56e1b8a SHA-1: 10a3685c74464ce0a1eb064d849ed70b5e9aaa1b SHA-256: 07e3c6312ec4cbe1b3d0c04d460d56c0c5c6258cc1a585e2744a0572181011ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://flooroverstock.com/admin/userfiles/file/ritipixiviboxedovub.pdf In PDF document text
    • http://baigeleather.com/userfiles/file/43645840822.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/942af4e650225d5a2204260bae245895/taduzekugo.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100b3da3e94c---vuvafisaxoforetod.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/65388802800.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609722fd41918---80618813639.pdfIn PDF document text
    • http://dgjst.com/upfile/file/nuwez.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/zufupeba.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/c2b1jutfcfm6m3nm8kd8kr4cb4/wogug.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/65796546302.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jokowomugatoxofexodebava.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/74430833844.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/13265456420.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/94478835496.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/43195761014.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085bc5468ec0---36011922965.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/195004182.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/wolokasigawalujutesezeson.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/19137162804.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/pq7jfa142s4f7hmjt8pntkbf53/88577079146.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/pokaredux.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c4603fd7d---27669957580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=number+6+coloring+worksheetsPDF 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_off0000cb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 18220 bytes
SHA-256: b77db3d5bc389720df54de1eb078626c16fbff8c30d5af93691cb5396ba77906
font_02_sfnt_off00011298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 11080 bytes
SHA-256: 652f7bd0fc84c3b82eeb288492338fc66778a89528b9d31d2d87dd591593c633

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