Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecff8f3209b94c6…

MALICIOUS

PDF

78.8 KB Created: 2021-08-29 19:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7ee88a7a269f64345bd4747bd838dcb1 SHA-1: fecd5c4fd096f73a6a8678489e044d2267e12118 SHA-256: 5ecff8f3209b94c634801036a4fe1f3d1759516b0431cd822a65d88fc9eeaa19
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary attack pattern involves luring users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://laborke.ru/uplcv?utm_term=leave+the+pieces PDF link annotation
    • http://thegioimaychaybo.com/app/webroot/uploads/files/riwomilava.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/fefifeponodik.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/3ph7fp0c3ogli58nltsfhe5puh/37709613192.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/kabej.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3da8554ef---34356670780.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/e76ee97f77188f46663b5e35119e687d/gijirefub.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6ebf1fa89---bupow.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/bibapepifevidelirugim.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/49034614987.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/37341197271.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/xataxoxexevif.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160902558854fe---wipopetovorixufipigo.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/41072160060.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/27982382762.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/da7e9a8626465b4055796cd6c6f66e08/dosuxom.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/dezuxekebopadop.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/e0a37lv1lqjmejg2pll0ab2qu2/jepasagobexasem.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/58d54ffb9c14860c6c694916772c57bf/tojojopawutopisawo.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/jogawotabufuzobigorojer.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/gizerulovasorubunew.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d091b6b35---xifitof.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/punufepem.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/1140678527.pdfIn PDF document text
    • http://htygroup.com/upload/files/14647012525.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612b4730c174b---furobok.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 17232 bytes
SHA-256: c213038a240aa173e4e6aedd69e506c096a68e05dfe6413a7b40610e64d74654
font_02_sfnt_off000117fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 10124 bytes
SHA-256: 0b00e81e44f06104629a09acc706d0e42a3deccd3186e67bc2278dbd45eb9c80

Open this report in the interactive analyzer, or submit your own file for analysis.