Malicious PDF — malware analysis report

Static analysis result for SHA-256 466522825090d95f…

MALICIOUS

PDF

84.0 KB Created: 2021-09-15 21:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11dddf66dbf110f446334f5a5ed9cb00 SHA-1: 255a8d4f60bc7e1be7c25df6c5894d64bbef5775 SHA-256: 466522825090d95fb66e00b2c9eaac2e1b4785ac9b121b3e6e611e362caec7df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=movie+apk+download+2020 PDF link annotation
    • https://mashura.co/userfiles/files/wemevojijezot.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/13c5a5e4a637f4a1bc90f3978c09b97a/dofirabuvamotijudixot.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/zarovawikevo.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/ratavadijeder.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/42386674570.pdfIn PDF document text
    • http://dentistturkey.com/image/files/94669936789.pdfIn PDF document text
    • http://someteme.com/archivos/_20210904140156.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/niselagumepul.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/zafetado.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/92904281025.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/lalulipemot.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/matirixabiruloguxe.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/zuvegov.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/nubogixaveziparu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef34b03162---54905601256.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/13651338140.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/75475449539.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/zisozubun.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/3805273174.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/pewotematizetatukuxamim.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/fewurisezuzalibomodulit.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/bofefatunatapumav.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_off0000e3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 10500 bytes
SHA-256: 0932abbb3e36a118ede67624c4d578c7ba9a6ee8a8abe41c275f417f258c79e7
font_01_sfnt_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 17988 bytes
SHA-256: 481e7d492b71caedac42e8cd6e1456558ebc039496d166fc2ec0032d4d76c92c
font_02_sfnt_off00012a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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