Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ded6dbb5c7a2ae6…

MALICIOUS

PDF

70.1 KB Created: 2021-09-10 22:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fabda41394a81416611df0e4cd9942f4 SHA-1: 58e660f1e67ec26362027debad0d50f135f3b1d0 SHA-256: 8ded6dbb5c7a2ae6b84b2acf77dc682b22a389aa648eabdda953642b04d3b9ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious or phishing content via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/22d1b66cb2eb119f323abba6f9a7fdf8/rotakomipofojazabi.pdf In PDF document text
    • http://floral-design-lindgens.de/userfiles/file/14440048117.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jshoju1295liutipag149a8fjj/bewekozejatu.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/2109010756117634683u36m.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/7426710651.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210906_020428.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/95217466727.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210910_BD6ADD7EB82723B4.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/webodozeromipiv.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/86813060025.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/86824186987.pdfIn PDF document text
    • http://vanhacollection.com/images/files/41270241945.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/13281115878.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9a1fabd5a---wewibuneviraxeputed.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/65935979826.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/nudofema.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/zijirojozezoveniki.pdfIn PDF document text
    • http://tfforming.ru/d/files/duvoxabudedowalov.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/godikopoza.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210907_89FA979AF91DD232.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/figozobe.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161322862ddcd4---vigunabur.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c996f24884aad39918111cf7dc74f211/zajebekawe.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/laxozitovigo.pdfIn PDF document text
    • http://telecycling.org/files/file/44005707831.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cw3+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_off0000b4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BC 15212 bytes
SHA-256: cb4d69cb4627b8a1159c9aab4f859e8cac60822b3ca3c42202239bfd922c352d
font_01_sfnt_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 10192 bytes
SHA-256: ac67e171d9e51f1733cb54914dc51720a9b32ad7297b4dba096fcefc1a427028
font_02_sfnt_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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