Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a009dd64a3e7ba7…

MALICIOUS

PDF

92.5 KB Created: 2021-09-18 23:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a22ffa254560c1ac25505f9d83e446fc SHA-1: 59c0dd4d3fa251c5843e9a2cf3054344776ac993 SHA-256: 1a009dd64a3e7ba795cc0c67c53793593754ba1a6fbf5797697afa48770e566f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many of which point to disposable hosting and appear to form a link farm, a common tactic for distributing malicious content or conducting phishing campaigns. The document's structure and the presence of embedded URIs suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=8+ball+pool+daily+rewards PDF link annotation
    • http://smalternatywa.pl/media/upload/files/e2d5f76d57ce8ab561fd2bc5b4c7746e.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/7d6c9448f7c42bce457180dfb465a68b/26034902844.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/40629263195.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/77835294385.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/ribudutuxowodalulovif.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/23056187576.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/93115452971.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/dexujonola.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131155295038---54149745065.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/73073287612.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/22177811987.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/xerevixepo.pdfIn PDF document text
    • http://unityproductions.com/upload/files/78928433017.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/jowesobetesilujedakumuker.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/67992443301.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/24568604850.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/luzafefulezepibut.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/23525009333.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/rixarimawikapopiliramu.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/79335059004.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/fafoxaxenatotinavakipeluv.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/3331906678.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/39203740485.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/11255509738.pdfIn PDF document text
    • http://ukrfirework.com/images/file/vajusavikapowikadir.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_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 18508 bytes
SHA-256: caf8a4cbb59677d4e53cd23b15f6cd1e02ed9c9b8f7f85d6241a245e6666fc9d
font_01_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1D 10632 bytes
SHA-256: 0af259c34e24686912634e2bf173e5e09dcbcec500d70f3abc4ff4a5ef9ebfb0