Malicious PDF — malware analysis report

Static analysis result for SHA-256 162da39bcd80f2ee…

MALICIOUS

PDF

68.4 KB Created: 2021-09-03 12:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 13baf82f0c50d10741ca0aae9ecfbb76 SHA-1: c6907dc47ed1443418421df816b5eff6cc1b666b SHA-256: 162da39bcd80f2eeebb6182c6fccb1a4a0df21c3df3cf07b4eee78f825a1ea41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The embedded URLs and the heuristic findings suggest the document's primary purpose is to redirect users to malicious sites, likely to harvest credentials or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://magyar-logyogyasz.hu/fileok/file/22116389480.pdf In PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160770f8956ed8---69596584200.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/90760361403.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2755c81b5fe9374fd678df04f73e50a3/puwowibesofalupizofu.pdfIn PDF document text
    • http://minipit.com/data/files/6010948614.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210903_7FD1E03DB85AD646.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe64c0b4b0---zobememabipugoda.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/zofosozurusuwaxikuru.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/b7003f3cc14cbbe27fcb53482e8f7833/83412041574.pdfIn PDF document text
    • http://coffee33.ru/archive/file/kurixatejevogonal.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/54318303348.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/a25d19f7949c469a8aee13be6d2b5365/wovodiwivirinimosoxoze.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/42170907479.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7cc838b7e---gobosokinama.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/58a192272abc0e8ab74a55d060c6c229/pebefujuka.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160fec3f61d1e1---11452855520.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/25768957809.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/rozawaritinef.pdfIn PDF document text
    • http://brlairport.com/images/file/fidiv.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/55418832893.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb4bda01c0---49066032838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=gen-eye+locator+manualPDF 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_off0000aeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEB 10416 bytes
SHA-256: 7e1d49d2197efd4afda6f6bdf258c85fb933c4c03101f1352320e383382a8504
font_01_sfnt_off0000c6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 14984 bytes
SHA-256: 1cc29cf61d946a4b634e74e973d7e8a686dc244e7d891cc2443ae71009957e1b
font_02_sfnt_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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