Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d19d1f6fc29e8a4…

MALICIOUS

PDF

95.7 KB Created: 2021-07-15 14:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 99466d1861d2dceefbc0aa504f6b0e93 SHA-1: c46eb93a10c499aab3bc3637bce8611c168d3633 SHA-256: 5d19d1f6fc29e8a45246402f1d27ee360b18a3f2cf13e7e615d8cf7949f57b12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The presence of multiple links to potentially malicious sites strongly suggests an intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://sumbulefendiegitimvakfi.com/resimler/files/vutapuferixepek.pdf In PDF document text
    • https://bodegoncriollo.com/userfiles/file/sinupeseraxelazin.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/dawirob.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21eea59e3---veranoja.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/32ac1d94a05180224b58de014c566002/23761831404.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/lixapumawabubisitusimiw.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad7a508e8---42429049957.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/fuxozajojosatesituz.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2ipfphdvo8u6q8p5n4pij4bmsi/24798356088.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/7714246773.pdfIn PDF document text
    • https://datajournonepal.org/files/77174726341.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/h8psf0858h03mhiegc7qcsialf/76574782037.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ls1u5bp9cchnk5hga7jm4jdjr1/88083096038.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/46325356044.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hkovg0gkvpejs7i8vifpe9l2b0/fifutijiliwodekowipuj.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/jonavoravegotikudowug.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/nebupadujuxevi.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/40082653984.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/92485679941.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/51475657459.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607887d781300---29425871554.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/db958cf8a1c6f74d0f36989282f5d101/87297088339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=standard+vaccines+for+babiesPDF 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_off00011226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 10704 bytes
SHA-256: 6030e766c7e1ccfa1462162ce1acdebce92795ad3e80887ca63314ae3cb173f5
font_01_sfnt_off00012ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 17156 bytes
SHA-256: cff68556a7f91ccf6aa139c0ea6aa476a8d728ac5fcd1615213b4ae57d4960d2
font_02_sfnt_off000157f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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