Malicious PDF — malware analysis report

Static analysis result for SHA-256 034bdee9a0848430…

MALICIOUS

PDF

92.1 KB Created: 2021-07-13 19:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 858606841c078e7efc4da518638cb1e4 SHA-1: e9b7998369ab163d3c1ebf37cda189d935936855 SHA-256: 034bdee9a0848430ff478a716a5766c3f2baa14f6afba62e7359943e3d2a2bbc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.
  • 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 http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4a0449398---39004621158.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/cq1u3kp7egls3vd94n8hfo58mu/20551220466.pdf
    • http://jirehenl.com/userfiles/file/030619241834.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56d0e64d42---91852455712.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160768d2b802c0---mirufapifotew.pdf
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/1782845663.pdf
    • http://botosani.ro/img/uploads/file/84023451486.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4ad217a23cfdc859be99b86850ed37f4/51901873822.pdf
    • https://candbco.com/ckfinder/userfiles/files/40718945955.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071996ecb38d---timow.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/suxuwijogoj.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7737bc50cdfad3bc2b579cfda382876f/84297181333.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/eed488062da0c5eddbe089a1a7333b56/madafadexenubu.pdf
    • http://primaneighbors.com/userimages/rofufutanigepezo.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/fk370la3jfn34t103knaqrafec/79627828651.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d2be1658c56e960d4618fe0814f66fdf/637978277.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5903f8ecd1---66444022133.pdf
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/jepebanutodojiruzenuret.pdf
    • http://strahovka66.ru/userfiles/file/xofefenaka.pdf
    • https://soliangco.com/contents//files/29822203998.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b781071f---malizoxabarekosutigazuwuz.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9fd77a4c---6585363556.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/8hdckhgumusefeickev71dbevk/88232601826.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/67e9b190829945dd22c003f7c5b4ad45/gefuwuvunuxorolovele.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8d743635702053b259d1e1048bb284a4/27574898987.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+untouchables+ska+band
    • 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_off00010388.bin
71bcfff5ae69ddadd38d96d50ac8bdfb110a6f850beca6dd7f6647017044f643
pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 17824 bytes
font_01_sfnt_off000132c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C5 16792 bytes
font_02_sfnt_off00014adc.bin
8bec5bfaec15dd146766d0a972da6069e68e97b14d2fcfd37c17af95ff248a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADC 10572 bytes