Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c7b6813c032933…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 07:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 772300026028b60cb10e7685691074c8 SHA-1: 17aa7db88a3c049325f77584625c93640d87225a SHA-256: 58c7b6813c0329337e709556c1a7904380121ff1e92c14d56c0593dad3b909b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or a scam. No scripts were extracted, but the PDF structure itself facilitates the distribution of further malicious content.

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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352f54a4778---pagujo.pdf In PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866753085a0---31841694385.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/99770686449.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/pubajuvafeb.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/44923456590.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4ba328cbb---bomurowag.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/7kjulml4b8ec49ptq6elhgrcl2/40234447755.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/87110159864.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/96776534826.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/patimetaseravogopus.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/poxujewesepuz.pdfIn PDF document text
    • http://capital96.com/userfiles/file/nisafisivulivogozarud.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/35596107903.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021081209561771.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/91d2b01bae7ff99f0fcffee795e586c5/manuk.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161269f6b09b1d---nivadasuwuvanub.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/27316044843.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210625021134_b9n3rc.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d4ac15e05---zelofukawajodikabu.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/dbc2dfght3ie2v8v5f8bt7h7s6/vixebibuvezal.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/guzinunevuxidaki.pdfIn PDF document text
    • https://tappowine.com/file/21519183049.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/28062567988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=rules+of+engagement+pdf+downloadPDF 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_off0000c480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 16952 bytes
SHA-256: 9103463bdebde643956da98bea1c5daa9d682af2dbb48c936c345433bd0820e8
font_02_sfnt_off000108c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C9 10880 bytes
SHA-256: 16e857bc28356621a05ede913d4459db9a5488072644664f37b7c9187fd966af

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