Malicious PDF — malware analysis report

Static analysis result for SHA-256 069d174fe90e9b95…

MALICIOUS

PDF

84.6 KB Created: 2021-09-21 09:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dd5a05066e7b01b10930fc7c77441a2d SHA-1: 64020620997ddaf76b88d1bb06e02da3fb82cb2d SHA-256: 069d174fe90e9b9565a51727aa53f63403f0710cf09345039a5c0effd9989400
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL distribution strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://ntvietnga.com/upload/files/luzapagopeb.pdf In PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/geloradevov.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/rukirije.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/55264746370.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161405d565fadb---63287953503.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/46432739504.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/41123099377.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/74413186520.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/wojitusemawupedimuwepo.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/taliderulu.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/dukerezejenuwegeranumumun.pdfIn PDF document text
    • http://boldogelet.hu/media/romun.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/82646592391.pdfIn PDF document text
    • http://446888.top/userfiles/file/lofulunoluberujejegilepu.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/37388033006.pdfIn PDF document text
    • http://speckrepej.com/upload/file/26536819132.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/memajelukozojazidasizezi.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411d4d3b46d---67424133077.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/98627546622.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/79323659627.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/74661877416.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210902111636_mnuzkd.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/doreserizuduwu.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/86821680205.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/seporirivavusemod.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/98706630823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=races+of+eberron+pdfPDF 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_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 10564 bytes
SHA-256: b52660fb3a1c374794abfe61d7e94cfe81a2ceb97d3debc05c2ddcd39ca29478
font_02_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 18908 bytes
SHA-256: 9377155cd4af271ebb6668ed38b56f0f76c81c6d316bdd1b69247d92cb259444