Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76934d98179abbe…

MALICIOUS

PDF

87.9 KB Created: 2021-09-22 17:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b40dc82e6ff14be029450710f99bb8ad SHA-1: 555e722229d3db2dddaaa09ca539d49319c2ac14 SHA-256: c76934d98179abbe84b337c6d122bb7f18a3078e6ea5ca6d00d67cafc8bbb188
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=iphone+xr+vs+galaxy+s10e PDF link annotation
    • http://vietkinggroup.com/uploads/userfiles/file/80281763287.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/riromita.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/wegedejetitejidiritodunef.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/87329168712.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/79016389099.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/3216872979.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/80349376258.pdfIn PDF document text
    • https://edex.co/userfiles/files/renijejagareroxemafopuz.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/wevomibusikimurowoli.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161468e0528014---kimiz.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/junelogolurone.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/busetogisaki.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/16376214337.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/65460718016.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/walibinowemuxalujasugade.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/xozatexefadobunadapulifoj.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/50268150909.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/45484452152.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/jisijakonikeropitawikiw.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/10276492823.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/paxunisekure.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/s2btpo8j3em3oajjem9m4d63li/pezetazotoxani.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_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 17804 bytes
SHA-256: 2e19c901c7615d2030978ce4a27b8bd4ee74a9aa190305afa343103e3c303c0a
font_02_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 10748 bytes
SHA-256: 3387991b4c47ae6f973d9931e1531de1808da6faef22e0b1a6ff8757adb256a1

Open this report in the interactive analyzer, or submit your own file for analysis.