Malicious PDF — malware analysis report

Static analysis result for SHA-256 23469246099baaef…

MALICIOUS

PDF

112.3 KB Created: 2021-08-23 11:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dab850abec9e17dbf0391cbc40bcd98e SHA-1: dd10e55f48b6f08c53cc350f4a293a2c8a858f78 SHA-256: 23469246099baaefbbcc1b261b42c51edd9da9344cdfd35c6ed25068fbf965a2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URI patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://madmojo.com/fckupload/file/wagejogin.pdf In PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/pexanopi.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/59050591436.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210607_021818.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b92b3a4898c---gisaxejaresep.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/91f873e55ee06124c895f73f45d0e123/tigufabid.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/25249734086.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210823152737_p141ug.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/tatetimozivefibenimidado.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/46365915295.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/xoxagatufepamafogew.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77321e6af3---8143960708.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/70857387069.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/zujeduzapeg.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3l51010d08kbam36nsk6qd1im2/14268392378.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/pofuzugekigunuvuru.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/52293821673.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/88422226439.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/669b6595f4863b70cf4633e77a2ad39b/41970351047.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbce0cc29c---39643596176.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/bolosesofidebuzim.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1611841297d3e5---mijotajotijo.pdfPDF link annotation
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3e7308cf---ruleke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=master+thesis+depressionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000156e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E3 17356 bytes
SHA-256: d360f84059641ae22402208d577c96047cf93a30567f6a8c12f715da4d3d228f
font_02_sfnt_off000183e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183E3 10436 bytes
SHA-256: 89a15c687d819ae9c2cd82fb46f29c855504a6ba8840b9649df9eacad66a4efa
font_03_sfnt_off00019b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B79 16556 bytes
SHA-256: 9dfb988bd98b92a57dc9539c743380fb4ba8e5535bea47f28aa4b614448cfe2c

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