Malicious PDF — malware analysis report

Static analysis result for SHA-256 45668562486f1cbb…

MALICIOUS

PDF

94.4 KB Created: 2021-09-08 01:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6498a5468b62cf4fad8ee7b26f1289ac SHA-1: bbaf38b00679998ea9e8b3b7f327fc0e3dfaaf1b SHA-256: 45668562486f1cbb10ffc5f0384d9a1541073f064d2d377bbd52a4022dcd699f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The presence of multiple distinct hosts and a high number of PDF links indicates a deliberate effort to obscure the true destination or to leverage SEO poisoning tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ff7a8343e6b---pakafogiwuvovebedunu.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61656e7b3c---ximedovebobarujibif.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/momulezixeb.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf699b2595---movakajepuporukif.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0538712e---90446867518.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/xigofesekojadotuges.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/fuxutomitugabewigut.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606caaac37f66---65542024045.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/87817503438.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/45450650814.pdfIn PDF document text
    • http://kfbi.ru/content/file/muzanagutawukuxigu.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/79155730357.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5f1a36c41---gebutafaparafikewipal.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5ff3acc5---27800483670.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/47851145801.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/67668512533.pdfIn PDF document text
    • http://vanhacollection.com/images/files/tajubotolonanegasikijexev.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e167d1e351---bufefekubufubezoverekilap.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/35900a59ebffe266d941c1f3bcc7797f/85403744632.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/45053738395.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/24995069266.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20216181138127464.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0351094f2---totetaxusarozogejirexage.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/tokabegupulotevap.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607b294edd933---bunojapotozep.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/sasejetirijorovowuzu.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/bixatoromojejasaxoxebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=sat+exam+papers+pdfPDF 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_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 10472 bytes
SHA-256: d6a48e1b9fd03eb7416bcd8738317891591695f6c5756e7af126fe585490ea2b
font_02_sfnt_off00013937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13937 19644 bytes
SHA-256: b70dd9fb312ebd89659511905675f469fc3ae899e31b39bc274a51d857fc5633

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