Malicious PDF — malware analysis report

Static analysis result for SHA-256 716921b97a4d1ce6…

MALICIOUS

PDF

82.9 KB Created: 2021-06-26 15:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b2cab2c32bc978e2f686e599fb9ea99b SHA-1: 3886762426483ab6a045b23e2a75e455b4a2e9f5 SHA-256: 716921b97a4d1ce63b754a604635317a12c2b9800bf614917125c754bd0efd61
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple distinct hosts and the use of UTM parameters suggest an effort to track or obfuscate the malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=january+audrey+carlan+read+online PDF link annotation
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951f77467eb---vokesidutoxurojiweti.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bc666338f60---bugobekuzasija.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/dutivijozowotisafosi.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc36dedb1---jibilobovifowafeba.pdfIn PDF document text
    • https://campermagazine.tv/public/file/51055384464.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/mowojedevajamufomaw.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/22620922234.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072e31812250---nagebapetuvatamaka.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed69007bc6---66107459750.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f53fd2a7953a69742162cbf125ce73aa/sofomona.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/wavinif.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/fejezuf.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/dd4aeaa4f508320bf8149ffc8c8b80eb/kaxatabatejigexebibunu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/kalokovagidudasira.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/14245850911.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/minosunoxafusavobijebefex.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160744c7b61aab---93174678643.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/bajogonolafanubej.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/pugefo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fc7663a4f10a1fc73ffcb6fb15a3c047/bawulazepifevibolaz.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1a2c766ec---zebipelikupatobev.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/vikonu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 10304 bytes
SHA-256: db722e42037aad3319c7bed04f56aa870578dd199bb6286553d1d92749c82523
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 17280 bytes
SHA-256: a3a1e2df14f3755cca31dfea89d700d2543dd406a3affd8858fbf4b9a14777d0

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