Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb9242bce077011…

MALICIOUS

PDF

90.9 KB Created: 2021-08-07 05:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 150b904ab1fc600f3b7155d67058cd51 SHA-1: 289e08b7b435ed573bcc362c143020b95406d198 SHA-256: 9cb9242bce077011f90433a8a30694ca4b6157cfde504aac451558235b884ad4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of multiple external links suggests a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b1cd68d55806a4fa9b11cf6524b99c82/95498480127.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d156d32e30---6045401811.pdf
    • http://portaldo.eu/contenuti/upload/file/11431961100.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160717a2ec8db1---puxixofaketukevabirujibuw.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b157348e0---xudewefezupifipizazex.pdf
    • http://lab4050.com/upload/editor/file/7271309303.pdf
    • http://cathugo.de/res/wysiwyg/file/77994138692.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/cb9699fdd60dcb7f9485a4e5ecd84e7a/lexulowo.pdf
    • http://baugeraeteverleih.de/benutzerdateien/tuzuvobar.pdf
    • https://pass-eco-energies.com/ckfinder/userfiles/files/kadagezofinifun.pdf
    • https://tckontrola.hr/files/98075685632.pdf
    • http://strandedtattoo.net/file/38145167437.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc89771280---xobubowovowu.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/ff724804ece19ae16751196a684f14e6/56085581441.pdf
    • http://laser-piskovani.cz/democms/userfiles/file/wimerurujesozudolo.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7892de9959---kozudifetitekifonomog.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/rk8iu90qkaqmvahn1gheqdm8ul/74463971461.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/rj129jia39mdqco6bfea62p9ni/89131800283.pdf
    • https://machnhaduong.com/images/uploads/files/bizopoxotitagi.pdf
    • http://www.contectrade.hu/fckfiles/file/sodizipoxokajavilupafez.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf7ad6b50---96954137179.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=libro+de+pares+biomagneticos+por+enfermedad+s%C3%ADntomas+y+microorganismos+pdf
    • 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_off0000f7f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 16792 bytes
font_01_sfnt_off0001100d.bin
98ad3a2de34e464cd99c4c1b043db0b0a2511f08b8447d8776cc0d95c358d155
pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 11192 bytes
font_02_sfnt_off000129d9.bin
5cd18fe0f590e3b7abd9b78eaadf1804f6a047ccc5f31d4969fa6136f59d09f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x129D9 19084 bytes