Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbac5af72793bcaa…

MALICIOUS

PDF

78.2 KB Created: 2021-09-12 14:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce59179d597bcb8e416eff33887b8347 SHA-1: 5c386a7b32f8af37ad76c3507cff124f74e1202f SHA-256: bbac5af72793bcaab7ededc695502232f51aa6fe4662fe642fe999218c0027dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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 http://ropesadventure.com/d/files/39036134989.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613735956693e---zifajevegixitizag.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/99cb2bceb7937bd103ae546f1ea59daf/mivetunezibomamesogikeki.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/lopebo.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/guluzarapewa.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/janopovenafizimavoz.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/96702205796.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/komujuwomedomagajosuk.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/66560861846.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/kikobapolozijir.pdfIn PDF document text
    • http://novichiha.ru/pic/file/gigoratol.pdfIn PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/sikezo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac32d87079---63561835217.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/fuzutani.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/70218013519.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/nemawik.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/14665765997.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613083a8f38db---tugegovuzix.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210908_180242.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/wujabikerakotewo.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/55337710866.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/soweganiremenoxasakawe.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/6495045729.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/59458838031.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/xodoponavefapesuba.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7b10331e5---jofome.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/61123051263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=stickman+3d+street+gangster+mod+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 18200 bytes
SHA-256: 5d6a8cd908485dcf48ad314321b8694c8ef9bcea28258c62c4c08c00eb0ab1d0
font_01_sfnt_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 11152 bytes
SHA-256: 56ae7a0442799261a62ee7af542db7a7faf8885796ce6fc829669bee706ee9fd