Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f7cfe066d354d1…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 12:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bea8bf7e6b4a1a1f5a92a50d1e063def SHA-1: 828d9d36aeba4994d531d2c8d64c0c4c29a5fdbb SHA-256: 32f7cfe066d354d140db0ee55160eac2c38c22092431f18325f02c8daff104a4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to potentially disposable hosting sites, suggesting a tactic to distribute malicious content or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious or untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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.
  • 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://zjhywt.com/images/upload/File/gupuso.pdf In PDF document text
    • http://kraemer-duennebacke.de/files/file/disukesolerizanevovatik.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/wukomeger.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/mejewopatowoxu.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/temamisax.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/84832187059.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f231dc143---33809587895.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/budobonamu.pdfIn PDF document text
    • http://www.520amis.com/upload/files/76258919632.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/68858012135.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16136058250805---kawulukasujuwipipelikufuj.pdfIn PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/5576322006.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/27858429487.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210905165704.pdfIn PDF document text
    • https://mfdesign.hu/files/file/lofimawojulawozoj.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/pilojotezariminoj.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/jaretat.pdfIn PDF document text
    • https://campermagazine.tv/public/file/45459332662.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/xunavopeviti.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109091714266456.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/20799178950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=telecharger+drastic+ds+emulator+android+gratuitPDF 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_off0000d859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 17996 bytes
SHA-256: dd54b268ac2ce80090c8767c4122bf3178aec7bdb51906e7ebc124ba2cc3dc7d
font_01_sfnt_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E32 10880 bytes
SHA-256: dc7498e7e6f2e59fee515afbcdf75d170244029d4fa329120c756942a11d26e0

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