Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e12392db78f34…

MALICIOUS

PDF

98.3 KB Created: 2021-07-21 11:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 63d6034191464be9697728fae7cc7220 SHA-1: c69d351839adffa79b62f54ee8d68be68c43eae3 SHA-256: 6e7e12392db78f34ce3b9f07b75499782e1276e7762772b359318ba9c0b453d6
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads and disposable hosting. This structure is characteristic of a link farm designed to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://softtox.com/new/userfiles/file/33965414736.pdf In PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c95181068---59800434661.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/14065863097.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8cbc251a4---1584879532.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/22485702306.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/tebaboxazipatu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3fa871c49---92347281808.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/50762860225.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f9cae3e5---12480991429.pdfIn PDF document text
    • http://chapelguild.com/images/usr/vowipotunisopigidozuv.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160e021cd861d4---95499733443.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/pelofukogubadanevewopumof.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/06adfb62b6820338af70fd9ebc206acb/5916858950.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/ziwarivenavuluxexonitiwa.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac237b0053d---32233951272.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/xanowokodi.pdfIn PDF document text
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/92965712074.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/sutolija.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/bekak.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc438b5c1a---sadun.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/noxunozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=quality+of+service+bandwidthPDF link annotation
    • https://mediaget.com/userfiles/files/82804232425.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_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 17492 bytes
SHA-256: 13585ddd0d4cf34dfca84186a00d41aafadbe37609c465bc3bdaa98d019ffb40
font_01_sfnt_off00014a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16217 11136 bytes
SHA-256: 20e2ad46ac24869df6c2af2259724b4f4b9885e7a52ae6da4d3e1c274d98a6b3

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