Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b0ee2b81e3292d…

MALICIOUS

PDF

85.2 KB Created: 2021-10-14 08:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a8fdb38cb7b2c9c5610ac6cd3652292e SHA-1: 23293776ea797fdf6610430b2a7644349b78ca1b SHA-256: 85b0ee2b81e3292d48313ec9ab7e59a40ab15385122c047cba59d53c995f41f5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to link farms on disposable hosting, suggesting a phishing or spamming operation. The file's structure and the presence of external URIs indicate it is designed to redirect the user to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://infrive.ru/uplcv?utm_term=how+to+connect+2+pcs+with+lan+cable PDF link annotation
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/17ff31494306653ac2e5dcb5a46dec82/17838732784.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16163ab69bd001---11145466370.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/xulababepuf.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/86019638533.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/mulodebudaporabinabuxise.pdfIn PDF document text
    • http://getdol.com/page_data/file/48622827141.pdfIn PDF document text
    • http://sibstroiexp.ru/userfiles/file/pijuloguviwomovutara.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/tewogekimoxani.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/xisinebujodofiwawije.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/99071333049.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/togatulovubozuxoda.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/29008517812.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/pefubolubija.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/putoderoj.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-15/20210915190824310319.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/kelamagaxubovojijofigapo.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/kuwogenavujebodavipuxo.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/22372265868.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/56004910880.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/56562289987.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bvu/20211013/file/14355872933.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_off0000e59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59B 18896 bytes
SHA-256: 9761a6c13a3bfaefa1cd2420108167225301b3b4d3c16c8a394979bb27bd4b8b
font_01_sfnt_off0001166c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E83 10708 bytes
SHA-256: 9b0ce880ef3cf1e19301f6760ac28ae2de876cc5e91f9c669e758db97ad36fc9

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