Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ee9fd90395f698…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 10:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a33155f18b4c91eddef3fabcd04e26d9 SHA-1: 07f7f7814574ddee3b954ab496c9746870eb3594 SHA-256: 03ee9fd90395f698361c3563b9ece3f7ea57a3b09e6ae087612db63aee2edb4e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it's designed to lure users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such PDFs for link farming, likely to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/uplcv?utm_term=pdf+online+merger PDF link annotation
    • https://carolinevlieghe.fr/images/file/28092575706.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16271415831366135993.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/9a0bfc53d91184ce68ca9acafb1027ae/97481128057.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/f0u7hmcqclc1pggic95jj3qtj6/72577929578.pdfIn PDF document text
    • http://fini.hu/userfiles/file/5243674537.pdfIn PDF document text
    • https://interconformity.ro/images/file/rumugiwogad.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/julitikuxarowogogakoreje.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/lasejaxugajaf.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/5548209342.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/77306519139.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606f580f146f4---binovivumiputerovisimolu.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/parulokowilikebibudejuk.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/pipotazixirapuxolov.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7d88f5bf---kidusof.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/d73a9401700d14382cdfa71952cb7d88/11722165854.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/wolifikabisevakurosomu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hu5mp4u7di669udhgvtdhtnaq2/26196526213.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/tjmgkkfi7cnr1va6llhhjqaieopk9od0/rixuriwajojariniw.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/02f6f398392b1154d9b1b5a817f6a414/xarot.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/96320664532.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_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 17752 bytes
SHA-256: 7260b021b1deb841172b6a9087e19879c80aa7f29862ffa0d5967ea07a3f1316
font_01_sfnt_off00011165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001297c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297C 10268 bytes
SHA-256: eb68d753751e032ec8e090e2819f0ef55f3b70ed2da685ce348579f5fb292b76

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