Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8df920b27b8c79…

MALICIOUS

PDF

169.0 KB Created: 2021-09-10 18:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74944805ee5ae64097ce5b92c1189b9d SHA-1: cc13271f52ba19d3e96144777b04707ae3f2db4a SHA-256: dc8df920b27b8c79b97ea6ba56a38aa2e4777fa8d0b4e625eb3f62a9d7170781
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as file downloads. Heuristics indicate this PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=all+my+life+tab+beatles PDF link annotation
    • http://jfe.hk/userfiles/19871794855.pdfIn PDF document text
    • http://raczcsalad.hu/files/73799587563.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/85891017776.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/77783589748.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/bikufidadines.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6d5ab2c20---fibutafalibetejawozitit.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/30393613268.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/viwofijekefuwujid.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/23315556634.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/fekuguweponapev.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/salibadirorikipeze.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/82776064135.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/tuvas.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-7/20210907093519739264.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/xonerunivuzam.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/fifamujerovepimuwifesunu.pdfIn PDF document text
    • http://land89.com/ckupload/files/nelagolavive.pdfIn PDF document text
    • https://geniodelweb.com/file/62329681039.pdfIn PDF document text
    • http://cartopack.com/Images/file/xakokolabavetewododezopo.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/zuvavegosofepudifaki.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/xilatiju.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_off0002335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2335B 10284 bytes
SHA-256: 1f2a72f6561928c40795a577c47355edd5cffbd0b03bc1f90d5219e03c751f16
font_01_sfnt_off00024a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A8D 19444 bytes
SHA-256: d79796bb5a129d1d04036905cd923749fd35f1d76021510519f267c6610771c6
font_02_sfnt_off00027def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27DEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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