Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc2ecfd24edd064…

MALICIOUS

PDF

83.0 KB Created: 2021-09-22 09:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c427d0867515ad2b149e82e4d469242 SHA-1: 625491722e5f1c56af85627f3c31f8429f455986 SHA-256: 6bc2ecfd24edd064d34798812474d06881f5b9178e619b5ca42b1879d5504c51
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=racing+apk+offline PDF link annotation
    • http://oa30us.com/userfiles/file/66219386718.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/soduzepemomaji.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/bofaligawabesugobadumuw.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/lajojimefev.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/43028958103.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210912205911.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/jofunodaxijemixedopi.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210922153115.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/nolibonosasisub.pdfIn PDF document text
    • http://oris-am.com/editor_up/vudupufixutiziv.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/fovosufaxoxu.pdfIn PDF document text
    • http://mylodge-naoshima.com/sorusujobukilesizotex.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/faxatuvirudefenipitigavi.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/17018846875.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/52477013327.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/47038243909.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613245de91d2c---javojidixowadu.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/10941625781.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/peliw.pdfIn PDF document text
    • http://wmsone.com/eimages/file/moladozetudazonawetowife.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/20788615537.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/wikawu.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-3/20210903054844622742.pdfIn PDF document text
    • https://jagominum.com/contents/files/89745256456.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/pipagugabijoxiwowomexurud.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_off0000e200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 17344 bytes
SHA-256: 1138e4cc8c156636ea106295705df0566747930ad52c581661a2b9c14c63e045
font_01_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 10428 bytes
SHA-256: 6b00a02459004114b0fb45200ef1e830d7b660c10fe19547570914dea8a33e18

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