Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0870f64824d4f88…

MALICIOUS

PDF

85.5 KB Created: 2021-09-13 00:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9cffa6b882844f1a86f72f77e8f4ed8a SHA-1: a90c98b8b709adab467400b8018dda718a5a43a9 SHA-256: b0870f64824d4f886bb51a3bd2bfbddd4a101afd9490e7ce1ce35c1443aaaab7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 pointing to disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://krisoc.ru/uplcv?utm_term=bloxburg+modern+house+2+story PDF link annotation
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/28624321749.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/73294771835.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161307096570d2---juwomivuroposagesina.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210903131252.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/46655000351.pdfIn PDF document text
    • https://masihpt2.com/contents/files/42278212232.pdfIn PDF document text
    • http://hueide.com/upload/files/kisalofi.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/gakujanemuvapedotu.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/67667683660.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/xijanopeg.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/90339267027.pdfIn PDF document text
    • http://partnercable.com/files/75660039330.pdfIn PDF document text
    • http://aquafilling.com/userfiles/file/50239743978.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/16881863920.pdfIn PDF document text
    • https://terracell.pt/images/file/jadipiboxe.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109080950415238.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/benuwogenoloxoxinidemodop.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/fewidujojepa.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/nopakibofogagalasasus.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/81444248393.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/vuwulirawed.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210906094613_gsd8rc.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/42065469524.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_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 11068 bytes
SHA-256: 04b555e23d9c1d8b9c181e3a20d946d363b4d29e43cc408d0053b371c5d6ba1b
font_01_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 18632 bytes
SHA-256: e8fb39e02941801fc05011df37a10e8ec7fd3cd6a241e4f22480dc21b866dfaa
font_02_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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