Malicious PDF — malware analysis report

Static analysis result for SHA-256 3604f697bf5d221e…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 05:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbf6e093dd8b6de1b846b9583a416778 SHA-1: ab56ec5bbd7991f3aa3be16eafc62854661ef116 SHA-256: 3604f697bf5d221e774519159f90bdf90649e422166657249aeff3ec1d5b41fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1204.002 Malicious Link

The PDF document exhibits characteristics of a phishing lure, specifically by presenting a fake CAPTCHA to deceive users into clicking malicious links. The document contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086b6e329e94---92335029435.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a9db8cd14---98351058996.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844f4aa3b5c---47984129948.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c41ffd182934a29ab06b51ac8916083b/78459170437.pdf
    • http://aire-limpio.com/img/editor/file/92333535507.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/eudutad32avqtogjart2aij556/jupojakuxorebekude.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c8fe07ba---ganawas.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6400fbff---77117123108.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160922e675c568---dadaruti.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b1e32706---80390680148.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/7sngn68a527t26ti65vljdtotl/38135059461.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/20c79a9caffe82351960d24b8393379f/tozakujozajidimuvoba.pdf
    • http://alexlunacoach.com/img/editor/file/zunabuwotiraxuvilofave.pdf
    • http://ahxxzx.com/userfiles/202105/file/2332737792.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/t98o9ffj5li9dj712g6ilila8p/zubewalatalaxisesemet.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5200d531d---98629352911.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9a975fe74731d52290195ad19b895c20/57841644719.pdf
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/28003996829.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f166957652---bipofakivasejol.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58d588572---xugipavu.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/t550h057lp6ubfmkij6es660mv/sorepebep.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f697b78651---93113842398.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/4f6cce4dbd4912616357ff6a720f61af/70876641597.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607335a803697---94056017819.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991f402e264---58654769451.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/6135650354.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bafd226efd---96470611442.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=bet+mobile+365
    • 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_off0000e86d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 16792 bytes
font_01_sfnt_off0001007f.bin
6c5aa89062cce4eabf3da2ff7233800a66502ca1e8d363491b4978ebad63af51
pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 19800 bytes
font_02_sfnt_off000132bb.bin
c14a2b2991d532606703dcd08b31a9024255a73d435c66d53c61316a555d86c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x132BB 10400 bytes