Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6d8354adae95ef…

MALICIOUS

PDF

89.6 KB Created: 2021-08-25 06:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e5bfd777e92b22a033058d7edec032df SHA-1: ce1854eb0d71c985e8184450e8a83222bde1650c SHA-256: 1d6d8354adae95ef39c70c572274e8e37c426915c90fbb68a6f488918c9ef692
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/tawinulav.pdf In PDF document text
    • http://xtra360.net/campannas/file/zasazejolovajomeluw.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/74286333303.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e090c72de2b51df1ebfc320a851149ee/wolavuxipimi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16112056f062de---29981538368.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210620181748.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/350d74bf7e72552fbce0bd12311d2ec0/94819180950.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97015593532.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/57113247279.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/c12b58022fc36b033ec4e09eaa60a355/wonusejitixu.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/87616435050.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce2a68053---boxaxalagesolezalowirinor.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/53079051252.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f69dcaa5bb5---tomijeramune.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/92697822175.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/11900042234.pdfIn PDF document text
    • https://onelineservice.it/file/luzuge.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/50bd1ac4ea61951246ec01ed46a8b36f/lifopunolomasuwetina.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/595cacb958eb91852da699ff8ccc1489/4472573342.pdfIn PDF document text
    • https://heider.ru/wp-content/plugins/super-forms/uploads/php/files/e648c022e92d33d5d0608ac5005c67bd/fegenimoderegiwefonex.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/nidodolijumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=put+your+pretty+little+hand+in+minePDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/697986345.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_01_sfnt_off0000f61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 10704 bytes
SHA-256: 0aafdcbc620017e339bbd351ce1856fcb46229f7b8fb6ee3d0a24cd86d50b2f2
font_02_sfnt_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12688 18964 bytes
SHA-256: f3b22f5f7bda744d648746069403613fd48197e5daf881c06b4998e876133034

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