Malicious PDF — malware analysis report

Static analysis result for SHA-256 459fa40429cea16e…

MALICIOUS

PDF

92.5 KB Created: 2021-07-07 21:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0a68f5c3fac17367a78bbbf09281d507 SHA-1: 49c8ef6c1acbccb188c4de65b2711728b30ba913 SHA-256: 459fa40429cea16eef1e27a7f430ece01b3ff4a4950d0407e9b57deb81214f41
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm or phishing lure. ClamAV detected this as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific intent beyond being a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://daimarconstrucciones.com/images/admin/file/14442824290.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2d96acac8---memujaxerafepasebop.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/jobaxifawofug.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca60130786---jupexamol.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/vfjdf71rg2nlce8ndk8eoh5gf1/3519477012.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/52978294462.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/zebegalukit.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16090e9fe9d6bd---29212832525.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607812b87b5fd---rojiruzisomanazowibo.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/vaxemexiwiwine.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9695eda4af2dbdde7f72c6bc97a0d259/20428595391.pdfIn PDF document text
    • http://hyundailed.com/upload/editor/file/befizaxowisavomadari.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/vabikanij.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085beded2829---famavutoxenap.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3b3a64204---kogezumojekupomi.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608411457fde9---pimazidutetatusulemu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/tseq0kqd9ke1f43bqbtcrp8lgo/34276143645.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/34408442876.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a6c62db2359e6d0c90b9047164649a8b/xofebuxapesozanomem.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/869c6de49bb5c932474913d4bfc0752b/boxawalozolaxevugiwikif.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/fexisiredogejaja.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160af5dfbade40---12533857473.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/vepob.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/jidemiwijurerataduxorafi.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/64931639749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=history+of+fw+taylorPDF 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_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 10160 bytes
SHA-256: 92c19777f4abb7da7d8115285e3c2537b047ccb230f87bc48fe58adcc0f306a6
font_01_sfnt_off00011b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 18088 bytes
SHA-256: 36aa8b7b32070b2122d055860ccef9e42fcee040c4f16c614a3fb0813201354e
font_02_sfnt_off00014b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1