Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad79cd2502783088…

MALICIOUS

PDF

223.9 KB Created: 2021-07-03 22:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94afffb45ac3c5d31d3093249f9b72fe SHA-1: 79008f12d18b8cb9a3e23752ea62ea225c02362b SHA-256: ad79cd250278308888aec43d84714ca60df2cdd33dba285954f4b53a934ee89f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to compromised WordPress upload directories suggests an attempt to host malicious content. The ML classifier also strongly indicated maliciousness. The document likely serves as a lure to download a secondary malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allaboutdowney.com/userimages/mumelinenuz.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/m8f907t3kn57gf9805f9jf8q65/5962903645.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ellmc8ev31rs6i7t9ukjgv9t21/polafiz.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb575b29654---sipunogafoposusobuk.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8004a026c---99560849979.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867fd374eb8---toxuborogowutukide.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5016f01fbb---ritojewomomogele.pdf
    • http://geoass.eu/userfiles/files/33709151011.pdf
    • http://mashtalkandil.com/userfiles/file/bebige.pdf
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/bexetul.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1de19248---88972813557.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb0d63826---56306269879.pdf
    • http://asiancfea.org/userfiles/file/11186125036.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792e574200f---jagofotizitasulodevewiwex.pdf
    • https://daismene.it/file/zedepudamuf.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ed573476006bc01ee49a60a0b167b5c9/25320602095.pdf
    • http://its-bulgaria.bg/files/file/razutaxelog.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e70f0db7d4---2862751972.pdf
    • https://weeb.nu/userfiles/file/13673494825.pdf
    • https://aravlicraft.com/cmsCart//upload/file/sujolisadoxijijasuvoxif.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/da5e69685cd66793832f16cd8b6e5278/selimijakeveferivebukozow.pdf
    • https://aprenda-atdi.com/uploads/files/sezezazuvisolafexafav.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a81eef18---92368709416.pdf
    • http://www.aportecnica.com/imagenes/editor/file/27389823738.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9c45cacc2---nonesikadifumoretipo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2016+forester+xt+manual
    • 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_off00031048.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x31048 16792 bytes
font_01_sfnt_off0003285a.bin
da8fa3be2069bf40bf3cef548710e1274f53f2bc8a294c7dda582f3d11558d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x3285A 18372 bytes
font_02_sfnt_off00035834.bin
924c4c54f43f1ba5e314e2f4beb4f7b5b23f23d072f8914328bc6d70277d495e
pdf-font-stream PDF embedded font (sfnt) at offset 0x35834 10852 bytes