Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d273dacb09f585…

MALICIOUS

PDF

97.7 KB Created: 2021-06-30 04:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f78ad5702e38869c8475186fbf645fc5 SHA-1: 69a1242f947bfe66b8ce34903b3be73e56d2bbb0 SHA-256: 07d273dacb09f58599eef9da15c56b0bdba7530aef06e6416859df08f3101293
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and numerous links pointing to compromised WordPress upload directories strongly suggests malicious intent. The ML classifier and ClamAV detection further corroborate this, flagging the PDF as malicious. The embedded JavaScript likely serves to download and execute further payloads or redirect the user to phishing sites hosted on these compromised domains.

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5abb8bblhski5fpper4ttiu57p/dovirivinurunadid.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/bca402221439b9a1909c7e7b18197b42/gudum.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b064cd9ff6897567279612234ca1f9f4/9063109773.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4cf70b16fc1d368f9affd0a055531b57/3765718789.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae3f4b7c61---34650191414.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9625369ab---34011979121.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ab75135f814297671519ff5c84de70f5/62923470164.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d42ee5a3c384ed791d5409a843c5d89/puvobal.pdf
    • http://ufnk.fr/app/webroot/files/file/17940122591.pdf
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/29329447147.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5c33cba1776c42d64a073906531a31d5/12792493648.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/egjchnoeu3fn56q54uvep0jtq2/pukoferuvegur.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607583d52c276---44587302077.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fca7f99772---32510291329.pdf
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/wafagezunur.pdf
    • http://lycee-elm.org/userfiles/file/reposimetezifedasewidoj.pdf
    • http://amadpich.com/userfiles/file/nuxoxerusorele.pdf
    • http://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/juzelewuvanukobonemiki.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+draw+an+alicorn
    • 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
font_00_sfnt_off0001062f.bin
110e72654ee949f13e7407d71602593177a22f738905298bef8331c60a21cd89
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 10140 bytes
font_01_sfnt_off00011ce1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE1 16792 bytes
font_02_sfnt_off000134f3.bin
dd0d20dbb1c55b3751e4522edae7da2f899a6eea3e85f48a5f2adbca9a7a7293
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F3 17968 bytes
font_03_sfnt_off0001642c.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1642C 16132 bytes