Malicious PDF — malware analysis report

Static analysis result for SHA-256 801fb2342a19ac20…

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 01:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ab1d824b32f541ac7a27f37b09a07fe SHA-1: 064e8bed99c4973a8655642fd3f864326dbd2ec0 SHA-256: 801fb2342a19ac20b38b3f62043d4d57cb9da01f5d90a9d54047de69266dd8e5
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://queure.ru/uplcv?utm_term=popular+cell+phone+games PDF link annotation
    • https://siliconautomation.com/userfiles/file/menuwibeguwi.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/83950965966.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/xararupez.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/73958215260.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/98a9hqpa37stbim12lubabrlf3/dezomezetapodafujafap.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/waban.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/73569437908.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/bujegodipepugopu.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/jikijimodozeri.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372290c6a02---65745853188.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/pibolajuba.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613630251e088---megefezatekil.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/gifis.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/75518493492.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/poxipidovenaxuwumafowi.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/jupalozusifisi.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-15/20210915215810421020.pdfIn PDF document text
    • https://masihpt1.com/contents/files/44351535957.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/wilavedegupomimuxi.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139357c179e9---92232840919.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/75930894227.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2jg9djhn7m6gbahaqd9eg58qmk/8883980854.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/71745399371.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_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 17992 bytes
SHA-256: 754e8317b8535676b3d649b9cbddad87d217780e1bb179ee90ba5d5d265581f6
font_01_sfnt_off00011816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11816 10732 bytes
SHA-256: 04c4d138554f12246dedc75ec53d8dd3c4df0e6fdf5306c7b070e02a2c1d2aa0
font_02_sfnt_off00013097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1