Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dba3f64aa03e291…

MALICIOUS

PDF

81.0 KB Created: 2021-09-13 02:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c272fb21eb895747f8e11ecf95403af SHA-1: c68e642f84a16b087e95f46342343d285241b268 SHA-256: 3dba3f64aa03e291bf62843cea186982dff34f5e7b1f67a286b6c53f26a7816c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. ML and ClamAV detections confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bagliodeimille.it/userfiles/files/42787600689.pdf In PDF document text
    • http://tgtech-auto.com/userfiles/file/45399872106.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/beba45d28c7806f34f6978818c266581/82974264364.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/doralagu.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/gejalazujo.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/badojaxomugireteluvisajo.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/pofiwugababota.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kidoxufabiduzunezogepe.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/mikanuxotonusanukadarawar.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be0d04cbf1---29446031801.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/teguki.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/lepinokizetivokid.pdfIn PDF document text
    • https://laps.pl/userfiles/file/92596938897.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/vujopoxesobezodela.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/vupewamadok.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210911211423.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/nimofudurugifora.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/91793498879.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/73022319461.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/fasefibogofadakopu.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/fabukotopatena.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/velebipuzajevub.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210908115858_i66fni.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/91167668885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=tasker+apk+for+downloadPDF 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_off0000d799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 18332 bytes
SHA-256: 338b979865fd100ab931196d68064323b5fa8b3bedb9017811dc2dd0df4ef7ad
font_01_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 10440 bytes
SHA-256: 27e2893af1d2953743515eb0bfcfc9317ec3c2baca9c98213cc5925564f6aef1
font_02_sfnt_off00011eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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