Malicious PDF — malware analysis report

Static analysis result for SHA-256 06833e177deaceec…

MALICIOUS

PDF

91.8 KB Created: 2021-08-06 09:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ad25ede384e0fb8c4f379ad9e916a7ca SHA-1: 2058c35c982f994c2d846b6ef9714c45dd3cd44a SHA-256: 06833e177deaceeccd45a9199b2466107c3a04a7d546808be5c01fd830aaf1cc
164 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. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the phishing and malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://oniceh.ru/uplcv?utm_term=zombie+shooter+free+mod+apk+unlimited+money PDF link annotation
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/c7c751a9a7db3f728d2e6d42040b33a4/girogizero.pdfIn PDF document text
    • http://rafaelokazakov.com/file/42082927682.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b81a53122---13183472898.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/50426281158dc4eec98a812f649b29ee/pikiwekenajejub.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/6216180077.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/logeromo.pdfIn PDF document text
    • http://unseretochter.com/images/file/37565009666.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/1f6c3a423a67244ff323663f45275daa/nodup.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/jimadusasisigapal.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/38540479931.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/61216379461.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/jokodaxa.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f8c97973842efbf50e4ecb667af78cd8/wugovupi.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/bufazifonafadenosebot.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/96132989562.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f5af38b678eef9a2c2bbb44571206622/98887074457.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7008202a1---28119940424.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/10380221800.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_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 18192 bytes
SHA-256: d3000c09b5613228a44901bc4d7c248d1b48d100c0047d37fcf67b443e0cb023
font_01_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B8 11172 bytes
SHA-256: 90ee6851d2b5513b471d61db84ae992fd4b6b0b8cd2d8eb42cda678328fc4b79