Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1222b4299657848…

MALICIOUS

PDF

82.6 KB Created: 2021-10-09 18:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2aea62bd465aa578a17376bc65782dfb SHA-1: c495c226fd0c9fb6ddee283512f854ab0baa4101 SHA-256: f1222b4299657848a6e2ee10fb4ab1f43c54a4beaa03d840ff9cf2e2fea76102
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=watch+well+dominated+love+chinese+drama+eng+sub
    • http://fine-cottage.ru/userfiles/files/17628003760.pdf
    • https://pastelbuilders.com/userfiles/file/bilabakorazojo.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1d08b604b---purizagixipuduwobavuwada.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615aa94f7d296---95316316112.pdf
    • http://foodchemsino.com/d/files/38084149595.pdf
    • http://leruichem.com/upload/files/xolojapokewe.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1615e3c5da5fe9---41765402669.pdf
    • http://lpxs168.com/filespath/files/20210919224954.pdf
    • https://samowar.me/userfiles/files/mesoxadijefatojoz.pdf
    • https://ikorti-iao.com/userfiles/files/5356140474.pdf
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/tavajusuxuji.pdf
    • http://soc-in.com/data/media/files/79623882240.pdf
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/91666923361.pdf
    • http://balone.net/_upload/file///zanevedunirubates.pdf
    • https://thebottombillion.com/business_school/uploads/file/27529349981.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210929_F0CAA3B5E15DABFC.pdf
    • https://synersys.fr/contenu/file/93294876719.pdf
    • http://matsusushionline.com/uploads/files/91243112321.pdf
    • http://baltic-rt.ru/ckfinder/userfiles/files/88706172091.pdf
    • http://braghieriarchitettura.com/userfiles/files/mojojanofosufijulel.pdf
    • http://romento.com/uploaded_files/userfiles/files/81339548628.pdf
    • https://przyklejki.pl/userfiles/wipudimirivexajadogini.pdf
    • https://mastirz.com/userfiles/files/werejomozulixulagoxujerep.pdf
    • http://rideabikenews.com/user_img/files/25431307094.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_off0000d65c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 16792 bytes
font_01_sfnt_off0000ee73.bin
060104b5a00ea9fc8a03f7d89640e87f2d34604442b6aa466957250502fbb376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 11200 bytes
font_02_sfnt_off00010857.bin
61cb2da4f29f626ad55ccd47f0f1ba72db0f27ba387ac77bdac39e82e5716a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 19648 bytes

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