Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a46e5f01272771…

MALICIOUS

PDF

99.1 KB Created: 2021-06-07 22:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 76c2580c21dd6029fa8bef20c33af67e SHA-1: efef29448a82adc39a03548c6af831a821a87676 SHA-256: f9a46e5f01272771f4b98f67db0e4df8377296db5eb3f750d0c768bd93cf4b06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to external websites, disguised as information about investing in Ethereum. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The document's structure as a link farm on compromised WordPress sites further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://drafthe.ru/uplcv?utm_term=how+to+invest+in+ethereum+in+nigeria PDF link annotation
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/6ma8m7s8n5k5k9qfmt4cre4v7r/58313268866.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/49524050726.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf37bd1438---90599262103.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/931073f2c29cbabfb78545a45f53a3e9/paxerasiburam.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf5d78140---nobinumonomadogusa.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/sujolisadoxijijasuvoxif.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/hs6n1k1mh6sa41elsj7bfkur6d/89571375778.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6ec04bc7370d52ddeb53b8fec712389d/nofasizedusev.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/er99a0jh6n7enkbck7po7s09k4/79654675287.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/nonimudejowibanokadi.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/kojerujabovexufatis.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/53696730623.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/rmmlir5iv7ucvjmbduqh5p178q/39633673893.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/rcm90rnfde4ek885uqt41d7hic/pidukozixirozowulomogaxez.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/f3prajo184cinv0smbo8mtqgm6/xofamonapumasajejojav.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080792bad605---bubukokap.pdfIn PDF document text
    • https://dm288.rs/slicice/file/tufofezufuropalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001473d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473D 5180 bytes
SHA-256: 183042de3f3972fc90258fe547b9a530d0545256229224454087056799f685c0
font_01_sfnt_off000158c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C3 11520 bytes
SHA-256: 2cda85d335f948b46b8dd08216462928aa286ede47fa7dfa4760988111379b75