Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22e2d2fe274f49f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-26 18:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af97dfcefc8c0ffed700bb4c21c1b586 SHA-1: 701bc79682bb261f73be94f537b94820fa47d2c9 SHA-256: d22e2d2fe274f49ff2b05fe6089bf60de03af6fe48926dd772641832f30dddcd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • 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://garglob.ru/uplcv?utm_term=coco+full+movie+in+english+free
    • http://seoulsquare.com/userfiles/file/67962025764.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/ludexetoraxosezit.pdf
    • http://wwm-quanta.com/upload/files/957492857.pdf
    • https://i-chat.tw/js/ckfinder/userfiles/files/diralofu.pdf
    • http://panel2conso.com/userfiles/file/10782947445.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614df3a1bd4c0---59641742327.pdf
    • http://foxgraphics.paulsfashion.in/files/26097671933.pdf
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/77088626363.pdf
    • http://rootbeadmill.com/upload_fck/file/2021-9-11/20210911095907767064.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/19f2a189bacabf6d90ae24edb550115c/64236809411.pdf
    • http://poledance-chrudim.cz/files/file/vapulememudidubedefotef.pdf
    • http://bdsps.org/slbdavbatala/userfiles/file/beviseniwiwa.pdf
    • https://boyanbolyarski.com/userfiles/file/kefabagijoxijenumide.pdf
    • http://asupuro.com/upload/save_image/files/60384351166.pdf
    • http://jujucuisine.com/userfiles/file/xinosetirusexusevog.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bfd082869---mutijoxe.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147aa3fe6a41---luxeturatorewerinigax.pdf
    • https://wupaojichangjia.com/d/files/38838988468.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/nm3hf6e5p9vmiqmafdqd87b356/41564381301.pdf
    • http://sziazsauto.com/uploads/files/14514012325.pdf
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/68635131582.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c32bf8769a---17014324683.pdf
    • http://alacarte-husum.de/userfiles/file/20372626639.pdf
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/parivawokukomax.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
font_00_sfnt_off0000b3b0.bin
fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B0 16160 bytes
font_01_sfnt_off0000c947.bin
27119ca4316f745422792083b0fb62616073855464cc0bcc78dfb74b3c6cf791
pdf-font-stream PDF embedded font (sfnt) at offset 0xC947 18628 bytes
font_02_sfnt_off0000f860.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 16792 bytes
font_03_sfnt_off00011077.bin
1823cdc17893073e78c4e918a7d49a82ace2d5877fc32e94ed9d16fe7b6ec621
pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 10720 bytes