Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5251af26f0a30f…

MALICIOUS

PDF

75.1 KB Created: 2021-06-27 23:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a6505ff6d0dd217368ebe19ec1b124e5 SHA-1: ad5b54d2a7ce68bbdaaa673881f174d712c9bf26 SHA-256: 0e5251af26f0a30f1e5f49b02faa0b6e4716e7d92cf1c8dcc7dff0f93f6cb5b5
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 trojan threat. The document contains a link farm with numerous URLs, many pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30924d5175---wisaralutuluxijoxofa.pdf In PDF document text
    • http://kaupa.cz/userfiles/file/bagutilopifaw.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fb3ea3710074ced81c57879e3808c3fe/nezeveziwavur.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210606000743.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/aa2fd7d62bd8f10b66b307d4af96a30b/1590610171.pdfIn PDF document text
    • http://belloverde.net/emailer/file/5663277347.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/oquiv36splds9gqfgbg6bp9cgl/medifufejinez.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/dff2cf38856cf9e45c004ff1a8dac3e1/12577841295.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e62c468a3bf69c264af18abae488120d/25131674132.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g5tk7ej8amudhuk1gi5qhur23u/senarokokibaweduvi.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160813f052465a---76045522673.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/67505888374.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9512eccbb7---woreguwepemasodeg.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/99787299937.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16080915ca2330---58518443796.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778ce2c242d---23086468903.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/45b323b6a900afbfa80ef5171f655f51/51588189641.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/masidanogibe.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16079eeaeb6c9b---3256559491.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/48132906177.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/gepenijisegelifago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=1967+and+1968+firebird+for+salePDF 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_off0000c25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25C 16628 bytes
SHA-256: aee358dadbac3418c2746b7fb283863b3e7a2bd9b3c1a61546588859e3bc2f4b
font_01_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10940 bytes
SHA-256: 439ace203e250000356c1a7403c8b1b2ad27bcfaeb01737ba7e2bc4aae041cc8
font_02_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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