Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd77502b06ffd9a…

MALICIOUS

PDF

86.9 KB Created: 2021-08-08 03:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ec98c62f736e7b27953ab98ccb064b09 SHA-1: 70f9f779d3b7095e9665d21d9af251d95927524c SHA-256: 2bd77502b06ffd9a6b69ed214b2409ab9d5e36c6b9939a5eb571352ca0147110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, indicating an attempt to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f3b71660ecec8df5cc65e82f1251af98/28730221078.pdf In PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078a1de7ab37---sofozedodunibajonuku.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1625332740.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd95a8b9747---lebumiwaxoxezexupigefu.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/69045366977.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d49a155f202899e410f167cdfc45deeb/8595901566.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/46413877684.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0fa140544---mabere.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/lozisiwugadefatabenival.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/daregopade.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/907ee8089b8cd45c617ff6feec345183/56294936443.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/26614997533.pdfIn PDF document text
    • http://standardamulet.com/files/files/34502288217.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160993f73a9c8a---kodagiwaxevobakadaj.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/48600464777.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9b1ed36c---mamemuwiborenusiwuwo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8c340163d---38922419000.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/034b9ca785d609dc0d546e7695cbd54b/53641552336.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/tidabugifidejone.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a293a519f6a---gudosoxixes.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/56612787279.pdfIn PDF document text
    • https://wumusk.com/asset/uploads/files/pazozope.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/damawevuwux.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef400c5507---senajo.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/lumevipejaturavegixev.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/684k0btjlj3576f10ar8du9v33/3059654323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+witcher+3+wild+hunt+-+ultimate+game+guide+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_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 11132 bytes
SHA-256: 8dc663675a964ffeed01cf1bc6b02ed8a1d4b317f167b91d5b8beb3c3daa837f
font_01_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 16952 bytes
SHA-256: 7cde894c01c9fabd73c964c337792b64a98873291fe2db9a3b4e02968edf5ccc
font_02_sfnt_off00013412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1