Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6317174bd7281d8…

MALICIOUS

PDF

73.8 KB Created: 2021-09-25 14:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1344b830557477eb38c66bf711a2a0b7 SHA-1: 58b4028bc22bec2e42994cb8b9d0295464d3b5ca SHA-256: b6317174bd7281d8ba26965ddf8d78b2c1c9c952b485f353d3c05434c846decc
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=send+text+to+group+on+android PDF link annotation
    • https://egca.fr/userfiles/file/lelozemilomojubesumeles.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/40554764711.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/67985290719.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/riwun.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/58337168581.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/13757152596.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/26910635578.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/vopopakobokexireleferafa.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/80225054984.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210907181208_fhxt2w.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/55bd6c497ddf4e9aa533630350f72adc/57692087967.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/55193768840.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/73073015053.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/wenakizazuxixo.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/vegudesepeweweve.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/39713987989.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/xatulosabeku.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/78702669701.pdfIn PDF document text
    • https://value.ae/userfiles/file/2927070133.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/45889934670.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/kumovolivuvapamu.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/53420989494.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/53666747296.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/lejulinowejifesupofavasu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437590beaaf---83483175055.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_off0000bae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FA 18076 bytes
SHA-256: 2a8e0411a947180b2180a8d7d619e883e3575104d0e954af2759cbbd0f16e8da
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 10628 bytes
SHA-256: b0f4572f3437a6a6fe261137f0a95f96b89bc2b704aa22df011f175399de69b8

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