Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0e018eeef4645e…

MALICIOUS

PDF

83.9 KB Created: 2021-09-15 15:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a31245792fde4e3f4b197d394383e050 SHA-1: 0a7991f128fdd900a075626179a99835b9d756e9 SHA-256: 3f0e018eeef4645ed076f67fa7f72aaffa94fd4ce9631be594bb46cb3bec29ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external resources, many of which are hosted on disposable domains and appear to be part of a link farm. The PDF structure and embedded content suggest it is designed to lure users to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=stream+phone+on+firestick PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef7a221402---9395613459.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/xiboxanudi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f730df340f---foluxugizizefafoja.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210902140906.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/24616661735.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/69444417535.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/3725636682.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/milibonoxope.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/8809451967.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/kolikafil.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/lamufipovopujow.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/39269395544.pdfIn PDF document text
    • https://curvy.tw/upload/files/famewesomukunuvi.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/kidomesowodidinokus.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/33077632883.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/joponep.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/83300024520.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/45153263589.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/vubuxuderasiteluwaf.pdfIn PDF document text
    • https://fasleh.net/Files/files/fibevawifitonepab.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/41110289564.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/finetizodijepagitusuluven.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/detefajadoterunumezegagob.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/doretoralilifepidanusuvot.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/kogonunov.pdfIn PDF document text
    • https://redac.ch/upload/dipij.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/lodujajejopopufoni.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_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 17592 bytes
SHA-256: 16124fb5830e374c0698fbb3874421dd07e86f0f1727a7aaf3abd94be572424f
font_01_sfnt_off0001106f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106F 10864 bytes
SHA-256: 97f7c35588490acab2c43f6e62f8281d01784a47ba987237dd973f58512ced92
font_02_sfnt_off0001295b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1