Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6a7941a894a078…

MALICIOUS

PDF

92.9 KB Created: 2021-09-22 17:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bb390ad841a0c1c1c2e0a71c4d704a4f SHA-1: 91e325830a19fba727b220a835cf20ebefbc5ae5 SHA-256: df6a7941a894a0782cb55cb96a1e78ed9a130b541917d777dbbb4c25e6cb53a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The presence of a 'download button' heuristic further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb0e1940b5---latulij.pdf In PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/dofebimekomotipatitugis.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/52099553327.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/90206351611.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/zosugigelukuxuw.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/tegutujetuxezew.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/lepikomi.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/88345749569.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/37966112299.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/38628291584.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/totekawubuxasalesigo.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/sogukofodoboror.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/xiwaponeboxi.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210920103132.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/50738473045.pdfIn PDF document text
    • http://sinoorchids.com/image/file/65187748669.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161373b783c319---sujusozirerafubadaw.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/37773181883.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/59064602197.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/62542635674.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///dogozuvaxeweligalapaz.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/18895901353.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/37533988981.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/93797832012.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/vikejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=computer+video+editing+appsPDF 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_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 10884 bytes
SHA-256: 53fccdd1f27e259b9ea7ae1f555bfd19dcad5f475ae8c35acb8c4e9d6e55a1d2
font_01_sfnt_off00011f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001372d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372D 18032 bytes
SHA-256: b5f0ed3eb60872165caeac7e6c9629994361c62b542a58d40f1d05350d25ec5f