Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbebf3413b200fa5…

MALICIOUS

PDF

93.1 KB Created: 2021-09-01 20:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e64f029612c6d354b78a4826e26aac8 SHA-1: b0819b8b7bcce6f7acb42c709d88674624b980b4 SHA-256: fbebf3413b200fa53d1d10f434c1ad3b0270ddf6ca04aa001e6c98d2ff7700e4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics suggest it is part of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/6a5ff70d30633884235aed8290530bb2/boroxomuliwexod.pdf In PDF document text
    • http://dancephoto.ru/userfiles/files/pokasezip.pdfIn PDF document text
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/3115703558.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/caaadf6aa98857ec9275a8f887e7c5ee/jenirike.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/84731809574.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/lepogotifas.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/dafad10994e25f55644bccebf834d19e/53329363068.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/34749442364.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/32472902685.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/kejuguxazegalub.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea8190045---sejomota.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/73996551252.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608388c8ec2ab---77431955052.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/010322065625.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6tcec3put60dk2mu1kfqpnho10/dazedanabife.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c204322d6---japobuv.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/95945842335.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f0623db069f---poroboxezobapoxofavitu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69e7d31010---17422663577.pdfPDF link annotation
    • http://clarksville.net/wysiwygfiles/file/jodawogisojawodogomemor.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/da4170ecae1c3bfe9266118271ad04dc/dibawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=once+upon+time+in+the+west+full+moviePDF link annotation
    • 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_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 17228 bytes
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a
font_01_sfnt_off00013550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D67 10760 bytes
SHA-256: 77e2a92c136ef38a00fb140f3428449a2ccb5b4ca2c5d2115271d9a612584177

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