Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eef00d14232eef2…

MALICIOUS

PDF

78.7 KB Created: 2021-09-02 22:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0006b72f0b7622f8bc6d550a2289e067 SHA-1: 9db9498196d60a7300d605b10895b58fe4fc5a41 SHA-256: 2eef00d14232eef205919b936cbe89c028ea13a76e1639c5c682c3e50b10340a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised or disposable domains, a common tactic for distributing malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method to evade initial security scans. While no scripts were directly extracted, the presence of PDF URI heuristics and the ML classifier's high confidence suggest malicious intent, likely involving a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://sakaryakasaplarodasi.org/userfiles/file/gisesaxe.pdf In PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5e4b4dea1e131c4e37d8be906a6e1431/60865114277.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/mogetaribezopes.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/xumoreded.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b328d3174---kamobodu.pdfIn PDF document text
    • http://accronline.com/userfiles/file/85571504803.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/waxub.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/57770580254.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/fevodonovulade.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160db5d8fe3784---5227616380.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/44097779688.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/dasufubitofap.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/22681026519.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/vivowusojiki.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6c780d1d1---11111788516.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/pazobajelanitekigakuva.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/jonavapad.pdfIn PDF document text
    • http://baove24h.org/upload/files/mifusevigazuzokarujojatu.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/34240112945.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071bee81a3b5---giramebopamifeluz.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a87ca07b287---62965100495.pdfIn PDF document text
    • http://thaidicattery.com/clients/f/f7/f7b4890cfba443994123e46b8078d6bd/File/jurunuriselofujipidexuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=como+pasar+un+documento+de+excel+a+pdfPDF link annotation
    • 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_off0000cddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 18512 bytes
SHA-256: 0a52141cc326cfa58267f42ef4efa4860259c1197ccd64e3b940b199810cd973
font_02_sfnt_off00011436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11436 10924 bytes
SHA-256: 7343baec48016066c19d6b38c9e5bebc2f72eb4790e1ec77f572147e6dfc9d42

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