Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ca7a25e8669404…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 07:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 22a5dccaab95dcd691c9d855f2c57170 SHA-1: 8553cf18aad92ef0d92166a2e9bebfb5a07da764 SHA-256: 74ca7a25e86694041099581854768e363e4de2898b25518ab7a491fe84268249
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=aviation+weather+books+pdf PDF link annotation
    • http://pauseforserenity.com/clients/1/10/1002a5d8b3740fc7390aa1937d1ec3ed/File/nalivasexup.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/020025447b04d1c6654b8fdc461b49f1/46161315613.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609452e564234---kewamopogaxoxukezunesupex.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/ropuled.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/560d1p2jlp55eovsr6r4ufc3fg/sekopurorav.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/67d4acc6342a62f3e39348a64b7c084e/71753604399.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/bpjmca6ko7fajvth6tt2eukvk7/73806011677.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/217998c28efb5195ca6c7b2acb2837d9/kufisovujofopoxosolepu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3ee7594db---75037255865.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/bljerennb9sk2c8048mhipkq34/50499550379.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210708022617.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1612355ac50bf1---jidifikedododupu.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/22507289464.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/sonemamoboralurex.pdfIn PDF document text
    • http://ranagro.com/files/70360446997.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/wizokot.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/46720578932.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/92549491862.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/76671249544.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3e4f70965dcb773ba7fab23e0bdf7ad2/niropewivedozesuwab.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/satevipivuxeroxenokoje.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/51953045262.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/zigoxekijom.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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 18180 bytes
SHA-256: cce7d1c4a779b184e20f2ec947a78e3ff6c13c971580d29b1d5b27d0253fa9e8
font_01_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 10912 bytes
SHA-256: 64a559ca77ef0ed5aedaef97a0c86e4e5435ebb390d57b3904830ddc2ff7a795
font_02_sfnt_off00012568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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