Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0be2f4e810e5e8…

MALICIOUS

PDF

71.1 KB Created: 2021-09-26 14:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 85a36de36f727aa14cf231bfbfa5bef9 SHA-1: 7a7ff05eb4af1c1f889038b72929460e5f8332c2 SHA-256: cd0be2f4e810e5e8537d721065f67bc74ce13f81eb830e51c8aedbf8107c53e2
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 PDF contains multiple links to disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://machinesupplier.cn/data/product/file/202198_13513_500.pdf In PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/74046151635.pdfIn PDF document text
    • http://bwc.lt/i/mazef.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/xilopegumodem.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091416285673499.pdfIn PDF document text
    • http://gro-felix.si/uploads/73445560269.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/sutagixojav.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/dojiduxorus.pdfIn PDF document text
    • http://jutaek.humenia.com/upload/userfiles/2021/09/files/210919092021.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161454ca9da4cb---73008643596.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/82003547666.pdfIn PDF document text
    • http://bdsductri.com/upload/files/serobakezekuto.pdfIn PDF document text
    • https://protrialse.eu/files/files/kitirolipuvowutixerademiw.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/tudolawizatowibawop.pdfIn PDF document text
    • https://resicolor.com/upload/files/kaforudawigesetolajo.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/27288986065.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/86050069230.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/52214375459.pdfIn PDF document text
    • http://bienbao.net/uploads/files/vowepavaganirojekedofe.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/28326471429.pdfIn PDF document text
    • http://khachsandomino.com/hinhanh_fckeditor/file/difikemafenewatuzosizefa.pdfIn PDF document text
    • http://dsfly.com/uploads/files/20573106935.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/46836110215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=app+hider+that+hides+itselfPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210901/16304722379395.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_off0000b469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB469 10352 bytes
SHA-256: 51c3c523f41d2f33f465d6016282e0c3497d9f240392d43e6c8970a3d4dbef74
font_01_sfnt_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 16624 bytes
SHA-256: 2fb1d6c4b4878b6d2662b404e9810673aa533186e066bf2d63afc67f45dc23d5
font_02_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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