Malicious PDF — malware analysis report

Static analysis result for SHA-256 041e7104e50125cc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-14 07:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7b7a419914456d87e768d93a86f5c9cf SHA-1: e87b7faa82de56ef3a964bfbcffee75752ccbde9 SHA-256: 041e7104e50125cc179132dfbd0120b6064028076e51a5425364f9da874dec1e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Embedded JavaScript streams further indicate potential malicious activity, likely to facilitate the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=8+bit+binary+to+hexadecimal PDF link annotation
    • http://abaj.cz/UserFiles/File/ketidibenodakabodarojama.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/wuwoj.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/totanavafunod.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/90726422361.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///89174403075.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/20257098069.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/refosuvegegexowuwepov.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/vututinivegike.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/79796820094.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/letasosupenaxag.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/91167801505.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/miritobolomawan.pdfIn PDF document text
    • http://moristas.com/userfiles/files/25034539920.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210904093040675.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/jojoturagekujolupirub.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/95015273791.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/22154345571.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/86069564514.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/suwagitulenivolek.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/46790011586.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/notuwixizu.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/38262757525.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/gokokuguvolezixetuvos.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_off0000df2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 10936 bytes
SHA-256: 10e718dd590914adcd69d8693183ef66017db69a79819e0d3d7a11cebaee9a09
font_01_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 16772 bytes
SHA-256: 9bc1ac02e06c366f182ddc58b1b24034613535a4e6b54a89832192bc328657ff
font_02_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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