Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e7ecea6a9bca2c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 13:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa65922953feffb005ddd805da1a8a6e SHA-1: 9d02168f50f77e31f4b4a681786daa9684cdf5e4 SHA-256: 70e7ecea6a9bca2c28e02997b664ebc98a11877d54aba3c198e301a1968356ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/1c415bbaabae3421067f715deffa32fb/taxomabuveninowiv.pdf In PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/70840660789.pdfIn PDF document text
    • http://muszempilla.com/files/file/vonesajagamaxosutej.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/bebot.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kudamulumejubeke.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160811635b6ae3---zapadafe.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1624516114.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/32353903430.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/lomusikizumebivikazu.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/46531352474.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202108172356593163.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/16976210402.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051910581345.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/10604341750.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/kimowi.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/7469372378.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/zaderod.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801744d19ea---32530987214.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/visokorogabavipegefijomim.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d7e324af87f9a0c11da34fe600f84f29/79049280631.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/fuvotalofisekigevubis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=mcdonalds+coupons+2019+pdf+nova+scotiaPDF 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_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 11004 bytes
SHA-256: 918efd6ae88174d1b73dbc6a22d74de65d5f50ad12555af1cf98508e7b8af704
font_01_sfnt_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 17964 bytes
SHA-256: 48ac3a34a29c56f2b7798f39040dfbdc40419804f7f34d320c23af82873829c9
font_02_sfnt_off00011aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1