Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34cab14909014b9…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 00:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b57c0c5fb829c698bb0fcd23596796b SHA-1: bced576eb44e4bd7887c0a6f8d7bca13bf9d0f7d SHA-256: c34cab14909014b95ccd00c3a0c29ef180af32d1586c03f00428a8b402fd54f3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious payloads or phishing pages. No scripts were extracted, but the structure suggests exploitation of PDF vulnerabilities or social engineering to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://boisehighclassof1965.com/clients/879780/File/nevafa.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5bf847e54---sobego.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3a26209d---37007036818.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/41ab33dcaca584f54de0f22d84169e82/69982876317.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/56f9cb1c144eb7976db9d84807c3ceb6/wonozanizowelezuzu.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/25873679346.pdf
    • http://turinhotelcompany.com/userfiles/files/98526423615.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7400a019---84840327017.pdf
    • https://briljant-maleri.se/UserFiles/files/natupuzesigopakezozulu.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081e546d49cc---virafikazan.pdf
    • http://mooneyes.pl/userfiles/file/fatuz.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079177902eb2---dunewipuzobe.pdf
    • http://heyibnb.com/CKEdit/upload/files/lekobup.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/474f5e4d713ef4aed4f10fe5478e2a78/sakis.pdf
    • http://natproperty.com/userfiles/files/jezavulutulan.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/929b03882c3b89d7925555e1dffda4f3/78939863014.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607494eb74c93---10421615366.pdf
    • http://onlineticketreview.com/images/file/23691805698.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/fbife89oogriahqq0ptaoke1u4/75299706623.pdf
    • http://etre-belle.su/images/file/gewejikevelu.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8a5d35454---vosepotetaduwimewafap.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/u13eitbli44qs5ilgt4em547gn/wosesijugizef.pdf
    • http://thecreditcrisis.net/clients/73966/File/85210050405.pdf
    • http://bularz-auto.pl/images/userfiles/file/jaxemal.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=can+you+seed+lawn+after+fertilizing
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11f.bin
97a78082b61218e601f3e1b65486f01d7276d4c960cc65ccba0016c3994050fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 17760 bytes
font_01_sfnt_off00011f74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F74 16792 bytes
font_02_sfnt_off0001378b.bin
e7f8011b6644efab2a95aa5bf41e7aaf53b8384ad45e83e0b6be50e12e18b8e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1378B 10920 bytes