Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2dc00690eda2ea…

MALICIOUS

PDF

76.4 KB Created: 2021-05-31 06:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3d1da187250255e5d1dea84f158748 SHA-1: 6e17c5cf30b75eedf8be919100efabffc16ec7fc SHA-256: bf2dc00690eda2eaacd612b66754967451cd1515ee0d6c57f6637fd788b4b01d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a link farm, suggesting an attempt to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=ek+baat+kahoon+kya+ijazat+hai+mashup+mp3+download
    • http://rolmech-strzelno.pl/Upload/file/36376710024.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a5c121425a1f176fd2d478ec6703f478/kebugarugenefez.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/wojifelozuxo.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ccc602e62---38725696799.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea64e2fad6---72287514734.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/55de6d25a7c82e7ef7522e0651971cc9/42123682311.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b069c777824---sewanawirebelexuxaxekex.pdf
    • http://10glazsikeyrosa.ru/file/39984674646.pdf
    • http://tribo.kz/userfiles/File/23856805898.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16099d32bb3554---46497214487.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/fewidezadumobobizole.pdf
    • http://ahcxdq.com/uploads/file/292357181965.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9d899fa53---tudobak.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086a92e6fbbb---24342653941.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5be4c09dp6cfmdabsfeopc7id2/surerova.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea15b5b43---risifi.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a203420885f---4404172661.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000ce9d.bin
61d0160d0b7d28db1473deaea68a7802b690431168cc4797e60e34a560149bac
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9D 5748 bytes
font_01_sfnt_off0000e22c.bin
baec42b0952cee5c00d59dbc3a0ee972789d3706ebbb9413409cbb7dea8df62d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 10404 bytes
font_02_sfnt_off00010624.bin
c259421cf7191bf9da9d82af278835c7b135943ddfee2c6a3adb87afdcd80d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 18296 bytes