Malicious PDF — malware analysis report

Static analysis result for SHA-256 0304cdcffecbd43b…

MALICIOUS

PDF

98.7 KB Created: 2021-09-04 01:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e57f9b4ba11ecceab61ebae9220d0e87 SHA-1: 354fa96593c72e480671f2ce56621af29070e537 SHA-256: 0304cdcffecbd43bdfbef4a749e834b1dbaa89aa666c3115b73e3d0e71d9730c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to deceive users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f167aa6d---45276802422.pdf In PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/25948587670.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/69428938081.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/gimumid.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f813414cf6---37077970736.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/65528294882.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/givebedoxoli.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210812162875684525.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/gk4q4kijfor81ja2ffl2hcek03/20152774945.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/bobesefa.pdfIn PDF document text
    • http://edisonprivateschool.com/cote_dor_import/admin/ckfinder/userfiles/files/tobatuvun.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf11c14ab21---kojedikajopavakewidile.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37c86a1e2e---fiponetilizemevuguremi.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/57115b049e8bb2b4017e8a61007b31b9/37524317384.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/tifawu.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/77398541134.pdfIn PDF document text
    • http://www.toptehnik.si/images/70006469069.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/tufaxorobupivuxi.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/wimemutenoxi.pdfIn PDF document text
    • http://huntland.hu/upload/file/fesexazejirikowifurezemu.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f562159efcb052e8832a82b225121053/jemejuv.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a1a928c1788ddef33356c42ea419a2b2/26973229911.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7e211e8554a130488238a228ca452262/46838425288.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/fodegujezobiwigosigifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=delegation+of+financial+power+rules+2019+pdfPDF 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_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 18616 bytes
SHA-256: 7204048f9418fefdee1c92a1bb9327bc8cbb01bae7bde06d4f40190af1d2bcb4
font_01_sfnt_off0001498a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498A 11444 bytes
SHA-256: 82518d6193c0089e0c0dc3c7c7daef48f16850b534294b5bd38c1a6b53a92fb1
font_02_sfnt_off000164aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1