Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d290392708ac9…

MALICIOUS

PDF

72.4 KB Created: 2021-10-03 15:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d78fde84f6db9d7be56fcdefc79f50f6 SHA-1: f708386bdb6ebc78dc3f7fc0144089290d417bbe SHA-256: 612d290392708ac9db7b4d64148063e2e278672d737cf5e92b48ccc8d53e4b4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=what+is+a+proportional+number PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n984msoj9l6c1t43904kudivu3/629026483.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/55920782790.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/wikanigofitewitibuz.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/10760529667.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/83672037211.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/tujokosobegiwivafusexaje.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/20805151573.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021091404491073499.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/pokuzirureke.pdfIn PDF document text
    • http://becucci.it/userfiles/files/sigonodazubu.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/39394339305.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7c2460151---47192648168.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/97994108449.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/88716429165.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/2489261f6f10d3e7f33efe8665187228/95514897235.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16153f90f2b28d---xofajixirunobopuwuvo.pdfIn PDF document text
    • http://mc-opony.pl/files/file/99006513690.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/33012206839.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a8a5b0754---98862647286.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/13569123226156e79f4ddde.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/23408551640.pdfIn PDF document text
    • https://gcs.kz/data/content/file/gafodenijedadowaxad.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/kugodewulajorezited.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/73941124970.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_off0000b46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 18380 bytes
SHA-256: 77076677aa2af4380071ec646f342709c6fc7e1c37fd34e8efc226e5caf34152
font_02_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10748 bytes
SHA-256: caefc451b3ca61d75a94d14fbe93de21445dbc3adeef87f9bafd86b5b3f20420

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