Malicious PDF — malware analysis report

Static analysis result for SHA-256 a325fb6ccd749dfe…

MALICIOUS

PDF

86.3 KB Created: 2021-08-15 09:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8eb3c9e9cdefdea39a93a1482fab18ec SHA-1: fb1fbcdea9100d178b442776e18aed1e68bfcf8e SHA-256: a325fb6ccd749dfecc223611d2ea310f5fc51bc4615ff4f9b555d41a0d8906c6
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term=download' in one URL indicate a phishing or scam attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ewastexperts.com/userfiles/files/33474043121.pdf In PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4d0ee770---febufali.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0u9fhlqdr3fhvgco6b9f5m0ep0/44069454174.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/90b944188fc5f2c02f345a6bcae7f762/jukejakibabujevoteno.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827b41dd706---24531795127.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/7980677162.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/8o8nf8bmoth1na2ngbu8cuk3sp/94194987858.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/balosukuga.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/t79oloeo5l1audjjg27go6cqc5/84079496413.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/0725a3cea76657dd623392dcb694b8c5/15467314196.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863e01bec85---352461161.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/31367323909.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ggmn1gvuj26h7o95m1emcegtjj/3228877947.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210512101352.pdfIn PDF document text
    • http://unsersohn.ch/images/file/17308792505.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/6619c9bb02a9f41fd78343a9f70baffa/27831300739.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a24221eb4---nugamafugebideburuso.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/memadituzina.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ca0fa44---fovemanewozuno.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210810_95CB71AC8BF6706A.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/29119323515.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1b70714df1fe653aa4b8c6f111b8341f/vitosegabifuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+geometry+dash+world+full+version+pcPDF 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_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 11432 bytes
SHA-256: f4683babcfd26515747631a4a77cc389efaa6a0a1d8aa0a3f8c968256b030791
font_01_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 17132 bytes
SHA-256: 33680bfa5b3ad530c4dcec700a2697ea5ba028802e20770c43173f51d6f29e57
font_02_sfnt_off00013155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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