Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bb5edc4d3c3cb7…

MALICIOUS

PDF

73.1 KB Created: 2021-09-26 00:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c0fba0de033e70371647372d73d7b3fb SHA-1: 147873795a83c5c7b3b87e45c7a849b34f3fd347 SHA-256: e7bb5edc4d3c3cb72da3d7910c47ce3d9798e0420fdce8f33f74115b8f939f2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is often used to initiate malicious actions. It also features a link farm pointing to compromised WordPress sites and other disposable hosting, indicating an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450a7ea34e4---21062167512.pdf In PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/63025927001.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/98824700850.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210924032706580051ezph2m1gplmc.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/zujetuvaboruwogopo.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/38979602114.pdfIn PDF document text
    • http://scsychem.com/upload/files/lokokezokejudaso.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109010515211003.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/76340003416.pdfIn PDF document text
    • https://medius.sk/userfiles/file/gitewimiko.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/323fef634a52ba81708ebaf61f526877/kumidaluvamuje.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd2b3900c2---55826056287.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/38002543793.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/puzegowiradikanilez.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///numixopibobefexagov.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/bimulunovob.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/83761135646.pdfIn PDF document text
    • https://ocw.tw/uploads/files/reneboxogonisarawarivi.pdfIn PDF document text
    • http://meskerjager.nl/media/files/14578022756.pdfIn PDF document text
    • http://luatkhangthai.vn/upload/fck/file/302282758.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/75233521804.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161311297725c2---59918834242.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/koxakelafapanukodafumabo.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1631894214.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210904172353.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202109121816098309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=file+pro+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_off0000b9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F4 9944 bytes
SHA-256: 9a85135d988a4dacfb77cdb703786c5d3e79c235fe3ed1e42574b613cef5c091
font_01_sfnt_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 18448 bytes
SHA-256: 2ad14bed14ba03c06e95adfbaa8bc3d065fbe3d6a2461b73609217af53bf3dc3
font_02_sfnt_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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