Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c153ad176eb4d7…

MALICIOUS

PDF

69.7 KB Created: 2021-09-28 02:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3d18c435f1424061efbbe505fa29ca97 SHA-1: e75316c3a9e6c711f433e350f2cbe00aa93e32b0 SHA-256: 96c153ad176eb4d7417f6ba04c0adc89f63b9c6286613e1c300b6a8fa11b9be9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics suggest this document is designed to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://nomylo.ru/uplcv?utm_term=mod+gems+dragon+city PDF link annotation
    • http://lokalsport.no/userfiles/file/31455320654.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161515e04131b1---beropajusifirufasapu.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/51058663534.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/fajegemudigakusaxekiwa.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210903124813582.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/fabejokejelarijopivagov.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/gukiluw.pdfIn PDF document text
    • http://momsystem.ru/public/file/wuveru.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/10832209031.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16147f689a1e86---15809751865.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/rezejijamuvizidegeteme.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/riroruxuxupagenopofu.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/vagexav.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/jerawolapelizukuravim.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16147dc8aa714e---wofesopa.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/11072968463.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/39638521343.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/48593992735.pdfIn PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/63692272046.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/68597301760.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/6217713952.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_off0000b063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 15936 bytes
SHA-256: bdf9a7f66e20e8b1d1932904ca7226d470b765f9ff8c744acdd5ee6e68fb04e2
font_02_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 10776 bytes
SHA-256: 5ab64a3325a6548e0738f753da1ef7fc327b4f7b05ab90b26fc8cb7873ea8742

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