Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43df1421e6474b0…

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 02:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 97c5d151d0a1bce6bb8408060db04549 SHA-1: 496ddbfb2fa6f6d6037258f3b7bfa45d058fd199 SHA-256: f43df1421e6474b01d4b6adddcc35d474ed80e3a9fda2ff9a253fd028221da4f
216 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or credential harvesting campaign. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into providing recovery secrets or private keys. While no scripts were explicitly extracted, the presence of compromised CMS upload links and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://medvor.ru/uplcv?utm_term=secret+arrangements+login PDF link annotation
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/07cbb20d208e711cdcf03081d76841ff/ruzasaw.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/fibusatimudoxa.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/mopagodidobaleguxav.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/sawaxerumuxoxu.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/gukozulozo.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/57611167252.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/getufajefoga.pdfIn PDF document text
    • http://regmac.net/userfiles/files/87194803022.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/benonuziwodajanepixesilu.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/53175527627.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/5647115661.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/gf90etc983fao22vb14ml3jjfb/18233480102.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/78564412770.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce3280aab0---20828273166.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/44618322738.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/zoridevag.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/85112211931.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/42183980983.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/vijib.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/ginixoxeleposarigoxa.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/23595256240.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/lidozepejawinapuzezew.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/88663794387.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/debaf.pdfIn PDF document text
    • https://tarsiman.ee/files/file/kuwutamoziririrov.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143c2da2002e---8544172935.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_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 10648 bytes
SHA-256: 745f29f54ba9935da71392112b5ff4c778c5f110b4b2efac8b8190c7692371fd
font_02_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 17844 bytes
SHA-256: c063afad1dd63bd796bd1ede10cc9703e19cb99d002520dabffee4dd9c48cff4

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