Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6e82311835da64…

MALICIOUS

PDF

90.0 KB Created: 2021-06-28 07:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cda864997c771078161ac8a22aff06f8 SHA-1: 172b33a029e83b0db0da057939f993fde876d1d8 SHA-256: 6c6e82311835da64bebed872a60120b5f28101873fa0511ce22dcf95026c0a6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://riskhedgetech.com/uploaded/file/102285858660cbfc3d583a3.pdf In PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/mopuj.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnu1hpv8rcueb24seh39vunq6u/74633309044.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/142887a198f7f4dd563013fde44c3c20/majuganakuzumibe.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/meduxadopovusa.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/87161490961.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82f7b0746---favebavofowavofamazufawid.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/baxijolopakinumok.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/sobokobalunes.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/mikuliteverimuxikuvumanik.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5274d565c8a1c132a5d8d82070ef2f7c/xusizijabedodojose.pdfIn PDF document text
    • http://saydersan.com/firma/files/mekodomojuweg.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6amr0tr0af1ochruadgma1j7j1/90868033980.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/51551306250.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b096aee0121---78479968861.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/tejofenok.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e607987e659136b72177c28d8c9e8482/sokifalixelufit.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b2fd5e65---vutotovapuwope.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/833effac36ff2f7d5b12fce30f8ca134/gonitirimebu.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/38392387312.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/selikofugeneranekom.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/es2jnpqdm8fam2ctcgmum9tdkg/26314765116.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/35159889932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=excuse+me+meaning+in+teluguPDF 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

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_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 10536 bytes
SHA-256: cf992306e78ed0bb66b95b81f29c5f6cc400ceb5f27b4490e7bd4c7e08edba57
font_01_sfnt_off000112cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CB 18036 bytes
SHA-256: 1776cfab57e7e33c3ebc968ecb5325b2cd73a4402fd3d7f88e86aa0ebee156e3
font_02_sfnt_off00014183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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