Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b47fef7e070c51…

MALICIOUS

PDF

76.3 KB Created: 2021-09-09 05:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8ccb9855426d862cf1d158f7c2517582 SHA-1: f612ddbbc13c698b435fb7373306a44c1f55f7f6 SHA-256: f0b47fef7e070c5124ee41aad155a09fc6f1d24e442b1d3d3229d83fb40af3e4
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323aec39dc2---52159087632.pdf In PDF document text
    • http://www.globalnautique.nl/upload/files/15537124148.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/fewogunojatutiruj.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/66894175211.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/sugimitorusulim.pdfIn PDF document text
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/16635086014.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/kimebitabiteseru.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/rezato.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/lamelalaboxusumudi.pdfIn PDF document text
    • http://mlight.cz/archiv/file/98446589988.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/warerevisiluzix.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/fizovigipugazisonu.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/62223497243.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/bekuduku.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/vupetipotodesokuwa.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/39142862742.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/solumobukenikasifipubad.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/41484127629.pdfIn PDF document text
    • http://willowslakerhea.org/userimages/35599334092.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/15124255646.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/oefqil12216oclbiq60spped0c/jesifasanoz.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/puvokokiditosozidez.pdfIn PDF document text
    • https://activepymes.com/pub/file/tipopefufotagozogibujas.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/5663461444.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/wizazedesi.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/xorij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fillable+character+sheet+dndPDF 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_off0000c3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 18188 bytes
SHA-256: 6b8e0aff7618063512cdd2171c2314ff6953b64df4690818176174d5eba2146e
font_02_sfnt_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 10464 bytes
SHA-256: 08a8172be0f566815ef466b7b2eb3ce2a266b32a3b1aa5b1c69b5aef9f2bec7a

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