Malicious PDF — malware analysis report

Static analysis result for SHA-256 92edf00c65d5b32a…

MALICIOUS

PDF

129.9 KB Created: 2021-08-16 05:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d21b1dc18b811f88f66b03aae0378bff SHA-1: 08312e9428d9168ffcfa4d0e47d5683185e5e272 SHA-256: 92edf00c65d5b32afa4fad9f6c9ba18f0a9391063787d67c91cf455f2a0bf57e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. This suggests a phishing or redirection attack, aiming to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://habibitours.net/ckfinder/userfiles/files/lifisiregolirubemade.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b875b847f8---50105350007.pdf
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xomarevuxudebunukonewewa.pdf
    • http://akinmedikal.com/uploads/file/82437715927.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/bb98e08dd5775bf8a65fb5e5ab0e3505/sujaboserejotakojufixuse.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/319065cc993574619eb4041481d17ba9/laxelamelenufevixa.pdf
    • https://nbretail.com.vn/ckfinder/userfiles/files/tenivuxabunigaweko.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/o6eh40dodq451hh27i0bk3br60/97338904292.pdf
    • http://areawifi.com/DESARROLLO/userfiles/files/lagagofo.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160718ad43adb5---tewoguneb.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7738d7ceea---92025456984.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffdf79371---16412604014.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4529e94b489350b70b663bdcd266d211/20628831569.pdf
    • http://carefirstyoungatheartgala.com/clients/b/bc/bc61c41cf33a111e4089ebab1e34a2ce/File/15828776702.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cad9e23f33---dawadav.pdf
    • http://auxerretv.com/content/public/file/ziguratur.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/98222843068.pdf
    • http://petra-dario.info/upload/datoteke/zeginiba.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609671ab64ce0---govujenogopil.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c17173c07be---10886068963.pdf
    • https://mfdesign.hu/files/file/69164666575.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c929bdfc08---44825598778.pdf
    • https://ienter.bg/files/42070407446.pdf
    • https://csn-alliance.com/data/files/bogoridojatutavetoluso.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=m%C3%BAsica+quanto+mais+o+tempo+passa+leandro+e+leonardo
    • 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_off000194ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x194EF 16792 bytes
font_01_sfnt_off0001ad01.bin
4770ca93f2c1d4ce13fe0c596084647dcf05c43b87b6ebe8ee8438a42fb70b47
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD01 19924 bytes
font_02_sfnt_off0001dd33.bin
9cc72340559f2abb9fdbd9622e85c24b526c4e9c0a4394b5afbe9a65bfb97ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD33 11028 bytes