Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d8c5e2360a727b…

MALICIOUS

PDF

106.8 KB Created: 2021-06-26 23:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f6c83dd3bb5dcecf57e31e3905dc048 SHA-1: c840013d681a46d8a02c727f20208bd144ccd3a9 SHA-256: 80d8c5e2360a727b65618bc62669c123cc06b934074d355dbecf967a5bb5ec56
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to exploit users via web redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://drafthe.ru/uplcv?utm_term=usi+official+website
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/cf217e22fb383c236d7226c8305ecbf4/fexutide.pdf
    • http://indel.sk/userfiles/file/menugoxawonixovozikekid.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f821b2e317f0074c376c336dcfe79a80/46028907302.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072147a2754d---viniwut.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/17614937993.pdf
    • https://childrencareandliteracysociety.org/userfiles/files/tasopusotopikulodefarije.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/vimuludepedored.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/uv9iab04mo3ii979pha5rht5cr/zurademodajarexisawet.pdf
    • http://aa-nusd.jp/kogasamejejenati.pdf
    • https://cleaner.pl/userfiles/file/jokinetit.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b430da8d720---gedoletodu.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b81c3005864---44075878990.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/8pt9j3f5onkjp99ldaf16kuuej/67934114261.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a965031b1d982f6aec3588f5ffb71255/zelodaseberuvusuvi.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fd2d7949683fb66b58e90cad38a3060c/rarodopefisex.pdf
    • http://3e-recycling.ru/app/webroot/filesfiles/17195509095.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/12122427190.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098613da8825---faliliv.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/33548807428.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16221039596346.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ddd0924745b177d2b336ca4540003789/podib.pdf
    • https://dolmalatrek.com/userfiles/file/bujanagufusadiwolotime.pdf
    • http://transcash.com/ci/userfiles/files/62155713976.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/be0881017ef311a95f23ea73038c8014/motupupoje.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b802f486da0---zunulez.pdf
    • https://fokusmedia.com/images/uploads/26080446826.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d9937d22---19102353894.pdf
    • http://eurekaelearning.com/upload/news/file/84723337065.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016901.bin
6f159670b7801477c868f60f2f2bd8550a846a6bbfbd66d857748ccf904ddf15		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16901 28616 bytes
font_00_sfnt_off00010aed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 16792 bytes
font_01_sfnt_off000122ff.bin
04e381b41a848dbb1d985462982dc0641b49f8c212f1d7490558e0cbb2642d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 17724 bytes
font_02_sfnt_off00015162.bin
4afadda27c7f017e914aead5223ed181b62b8cc09ce8e5836cb6e65f0a211cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15162 10360 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.