Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf242d96c8b6089…

MALICIOUS

PDF

83.5 KB Created: 2021-08-20 16:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2b0459056b6e0e89586cf601b3122dce SHA-1: d2707a936f47e22809c32c35aef965c71cf5d22c SHA-256: 7bf242d96c8b6089f9de90ed4b74212c3b45a29c145952bf0ea6b3f48cd86c3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of multiple external URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=all+animal+sounds+app+free PDF link annotation
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/g6jabf8k16tfo7kcjgahr4of4h/91939832782.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d7d29387---72018894018.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a767031eb26---wanemububifajisis.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/70412611918.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/04537f6c51020fc2bea5222ab6c65226/99273797464.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/fiduritufetenomatitod.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/rurubusebitukor.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/vogiberejemigugagopezenaj.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4bdc22f7441690caa3db6435fed55b89/62971857952.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8d76fc4178372a3f6e5d8c009fbf6aad/zupasotegaxanesekedat.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/75aa37ed862129eec264d6895cdde232/10197837781.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/2638273079.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f58501388---zewadepexagatejebesavajof.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/wovibajewiroxunumawosana.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ddca3036c---11483857393.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/92c2f9e111acfea091d7b10758a3739f/86562380920.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/rifobenelejawo.pdfIn PDF document text
    • http://muszempilla.com/files/file/26788592504.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/pulukilegilubagulig.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/robazofokub.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/jumosibevam.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/lafidaju.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfb4b5e502---teziwojizezuluse.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/65577182842.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/xexalarebu.pdfIn PDF document text
    • https://123natura.com/stockages/files/vawiwejonulusuvesa.pdfIn PDF document text
    • 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_off0000e1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 10644 bytes
SHA-256: 308e661504a30dea8dbe19129ed7e6d5098085ab23636cea1f7897efa5217833
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 16748 bytes
SHA-256: 605d51485d0a477051e96054ce18ad3df1a1b57b5f12285c40105eb7eabc6628
font_02_sfnt_off000125c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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