Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a89d3cd6760d754…

MALICIOUS

PDF

69.9 KB Created: 2021-09-18 15:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8920e285d8e8e3c158836d785f60e41c SHA-1: 1ad344cd3205a9ff6b95c4935eb95eef27aa1974 SHA-256: 0a89d3cd6760d754e659e892686635c09b47913c95c329891f7b2a498b3d9493
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, including one that appears to be a lure for downloading a game. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm characteristics suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=god+of+war+download+game+android PDF link annotation
    • http://elsped.hu/files/file/peletofowulozakegavabu.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/xomiwiweve.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a406de696eac549deb5958d86d216a7c/60875729042.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/furisuvekujeg.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/36118437072.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210917_003108.pdfIn PDF document text
    • http://ijfbn.com/editor_up/33084271060.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/fofagap.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/kovaxagawedolo.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/50569949821.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/8610715512.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sobujenedogu.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/44234327932.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/pevatemifagapoluk.pdfIn PDF document text
    • https://bursac.net/userfiles/file/43148252470.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/23260444465.pdfIn PDF document text
    • https://ms2oke.com/contents/files/xitaruwanipi.pdfIn PDF document text
    • http://dinhviht.com/images/newtech/files/nuwodizilesinomoboso.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/mibimovunatokosixuzub.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/37995693849.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/rafenanofejaremasimog.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/6439412165.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/gaxulitezemo.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fda2ab2f7f---bosutewa.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_off0000b446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB446 10556 bytes
SHA-256: 2b90ef78012a563f5598dd04ec56a20aaff372cb11883ce795dd7d48bd6aca86
font_01_sfnt_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 15008 bytes
SHA-256: 27b1b1b7c683e01dbfd9c43c5d43197e50b912844ccd09e3d141776301790af7
font_02_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1