Malicious PDF — malware analysis report

Static analysis result for SHA-256 7869f30d7ffe4e62…

MALICIOUS

PDF

85.6 KB Created: 2021-09-15 14:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf9584b7317583e2f70b640c7e10091c SHA-1: 59f052027f1f57bd372046dbb29dda4617bc7304 SHA-256: 7869f30d7ffe4e626304db86e8a188e0afed7d64f693dd288516cc5bff688d1f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the nature of PDF malware often involves exploiting vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://vr-spagna-20.effievirtual.com/galeria/files/xatukasawevaxako.pdf In PDF document text
    • http://lightofislamonair.org/uploads/files/voraseki.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/rurovapamob.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16138168d26c85---24611370341.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/xawubokireweduwi.pdfIn PDF document text
    • http://dmkert.hu/files/file/98218108194.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021090912252447.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/tudurujo.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/36907364686.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/ludisirod.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/82340454685.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/zisirakujogolox.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/76721420325.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/26241540549.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/47652895974.pdfIn PDF document text
    • https://promise-land.com/upload/file/rogipez.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/74961086313.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/8579919454.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/90018883740.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/18212002530.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161409341ec368---namekoxilodepugesofaku.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/videbiligemib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=jazz+funk+dance+stylePDF 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_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 10516 bytes
SHA-256: 6441cefed1448e912c78a37c1d784ed063efabbce98c5e16f1ffaab670ad7605
font_02_sfnt_off0001179c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 18916 bytes
SHA-256: be8f51099a025fd299fddce2d20a3d27efed3d315e20a6cbb0582817f7248b18

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