Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f146c32ac0e000…

MALICIOUS

PDF

71.0 KB Created: 2021-09-27 09:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e803a7ae1e4d3ef11132b89b91389ea8 SHA-1: 6b3f15024b59551d5c9cf870cacef887211511f8 SHA-256: 80f146c32ac0e0009755084ac0bcb9cfff149a6b71463571177544ed6d37b973
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. One URL specifically mentions 'download google play store para tablet', indicating a lure to download an application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wasserentkalkung.at/ckfinder/userfiles/files/11833258614.pdf In PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/5545001603.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/62319796654.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210904123508.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/jixizudov.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wininovutuzugexodubi.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/pobisiwavutukesunuferogod.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/jugavekubaxewamefox.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210916014511.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/8921641154.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/disabor.pdfIn PDF document text
    • https://basisangka.com/contents/files/34591626351.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/wigadilanofaw.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/44881768914.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/bamapedetu.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/faloji.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fepunoxaxafutegojuram.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130948e5f265.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/renivuturabadi.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/rojadisogifopiwafijoxos.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/77761029448.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8ed902fcd---pirilazo.pdfIn PDF document text
    • http://orlickachata.cz/files/files/48516642479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=download+google+play+store+para+tabletPDF 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_off0000b157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 10816 bytes
SHA-256: 5b62eb61d2836646fcff2e67ee0eb7d46ee7304a878d2c128b6a4c597c0f1597
font_02_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 16704 bytes
SHA-256: 383325dd88ea57b3c281e57642f46d1deff776d92851efee98d58c01b1342a2c