Malicious PDF — malware analysis report

Static analysis result for SHA-256 10379ef4cdeca86e…

MALICIOUS

PDF

78.0 KB Created: 2021-09-07 23:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 714021410fafe9335a658d5b42f436d6 SHA-1: c8f306c947d9e3bb5db80053611d6ad19d3117b5 SHA-256: 10379ef4cdeca86e282dd0d4a98c33623b264d1d1f282f3d9e1364cbd60ea672
156 Risk Score

Malware Insights

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

This PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://contactfm.be/userfiles/files/68763590963.pdf
    • http://gleneaglehoa.org/images/file/12584364479.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/f7a9292092f96655db7ea9af52386ae3/fakotovitoxef.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/c5fd2eb8c2288ae394573d8fcecd057c/55259971588.pdf
    • https://aduanaldelvalle.com/userfiles/file/velazesemolavegubijow.pdf
    • http://ilovehikari.com/uploads/files/guwujobidajukakaxawi.pdf
    • http://phantasos.org/userfiles/file/45775948485.pdf
    • https://biovuspharma.net/userfiles/files/39508914180.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fadd5d4e2b8dfa6817f5148a948cc67c/pubotanija.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ad093a89---9613326440.pdf
    • https://qqhanoman.com/contents//files/majidudanezixapa.pdf
    • http://cn-polylysine.com/d/files/4445223130.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083c59dc55b6---ropokizejezikusanibevan.pdf
    • https://abugfreemind.com/userfiles/file/nofawezisexofelu.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5653e6584---71459015311.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f86cf455f26---wivunut.pdf
    • https://zionapostolicministries.org/uploads/file/gaxupaveranedazugoxag.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/bc8b8dcd8ee3fa71698a43710ecc84c7/83614196002.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/98p9fsokquogt69ijrc7ds9m43/13485312292.pdf
    • http://techscreening.com/userfiles/files/72479883876.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/68e9e9f3da7a5546e506060cc4f11aa3/48182155309.pdf
    • https://termoformat.md/img/files/zikuvozajasedo.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/298e8077063202fc917825bed04a068c/2126598165.pdf
    • http://uralcomservis.ru/crn_fls/crn_files/kamiwegamunugurex.pdf
    • https://www.tunnel.de/files/uploaded/file/40529280217.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tipos+de+lapices+de+dibujo+tecnico+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad7.bin
438a1a15f408c3552fdcb45bdaa4a98dc5fea2a2b19407200cc0c8cb5f536dac
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 10848 bytes
font_01_sfnt_off0000e3c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 16792 bytes
font_02_sfnt_off0000fbd7.bin
471c20954b1cb67bc754f153d7f50c5c0d01a076433d35a49aa7e6934e4b8365
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 18264 bytes