Malicious PDF — malware analysis report

Static analysis result for SHA-256 41591a6beb4bc015…

MALICIOUS

PDF

90.8 KB Created: 2021-07-18 21:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14c0a88727292aa6f8766ac57b4f9b24 SHA-1: 0394249c25dc02f4033d90a8218dd50da6ce14ee SHA-256: 41591a6beb4bc01552b2631024910fa76f976cbd6c97e598a051b0df2b7f8a01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure victims through embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608664d31e27c---95280793136.pdf In PDF document text
    • http://nonstopsushi.com/uploads/files/vokinolu.pdfIn PDF document text
    • http://erex.hu/upload/file/vijojelubefebodeke.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/2579206638.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9bd1e3740dfd3ae3d649240843dc4a23/kodozazopoxi.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/23249355174.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/k5rl50fdjvtaslj95jvfjglmi6/dodedifuvuzi.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/pababedosifuxajikajokafad.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/41445743048.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/61019168254.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3f488517dfabdc2f8018202560fefe32/58750759941.pdfIn PDF document text
    • https://wsbtitan.com/images/file/rikakuwofirigad.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/lonufiwoxu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/40927655800.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0373fcb318f77b63cc75092ab7db0857/56281867762.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/kubaredumavis.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/77383035778.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/1e04b84ca6615bb92104c928d3885ac8/50892533947.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e60ac6ac61b---duvopabelinoxik.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/574473145.pdfIn PDF document text
    • https://luminex.pl/upload/file/zemimu.pdfIn PDF document text
    • https://chp-travel.ir/data/file/wokalajujosojumupiz.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a409879004c---segozuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=echeveria+propagation+from+leavesPDF 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_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 10976 bytes
SHA-256: 8ad545b4f21a47cb5c48b47429156bd9290ee904c52341945bd72de6c4b87f61
font_01_sfnt_off000117ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC0 17696 bytes
SHA-256: 582991361031d1d79e6c22df9be4a9ce0dbf966f4e909cbf59e0d1baebfa4b51

Open this report in the interactive analyzer, or submit your own file for analysis.