Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d976aba8e0ec044…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 13:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 534133309372978d7ca060afbec0b092 SHA-1: e44185112353e13fded9884552a8e984b2aa1d4e SHA-256: 0d976aba8e0ec04450cbee0ed3e0b4b33f1e6e2073126e11eb77f48fb70ac32b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or link farm attack. The primary purpose appears to be directing users to external URLs, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://chcial.ru/uplcv?utm_term=first+marriage+certificate+pdf PDF link annotation
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f49c45ac3---85977562732.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ae507b614---82643776070.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/36981480352.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c85cbc43eda---54339469991.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/42615793837.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/xorozefitobevekefiziloka.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/nulixamibukoxamur.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/72101788675.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/35560848771.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/munufojife.pdfIn PDF document text
    • http://17njl.com/userfiles/files/wakuvugolojenujep.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/76166940829.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/3f776810c751e684686360eca5c3e21e/1445440730.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/73909695.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/6c6603d9f895916c35404e764b1e266b/20673110758.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/29508378189.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/44117550404.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/wobokokaninedavuluweleniz.pdfIn PDF document text
    • https://epiphanych.com/images/file/muxawunugugolib.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/8575218912.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea2cb0ac3---93173763013.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160861aa79558e---bavonufojuzoselinoj.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_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FB 10668 bytes
SHA-256: ba5a0b5eb507302cd8679495677508481212054d1b3c85664cc3966905676de2
font_02_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 17156 bytes
SHA-256: 3570098aa2f7a4ec726bef9a60626a6cd9bc14407aff5ab21fb8a9e23b0ad479

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