Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0b7255e1a3d809…

MALICIOUS

PDF

79.8 KB Created: 2021-09-15 14:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 49dad6b2eff26267a36c18bc0743f0ab SHA-1: 1ec239650c6d0f41c4a8da33351700dfdfb3dc37 SHA-256: eb0b7255e1a3d8090518b6e26a5ae693cbc1aa90c01149dec93607a1a9ca6f98
134 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. It contains numerous embedded URLs, many of which point to potentially disposable hosting, suggesting a link farm or phishing attempt. The presence of XFA forms indicates a more complex PDF structure that could be leveraged for malicious purposes, potentially involving embedded scripts or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://moscow-vernisage.com/files/files/sumub.pdf In PDF document text
    • http://h-st.nl/bestanden/files/vebubivopigetuwokuzer.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/mirole.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/razalinavikit.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/3474361729.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/bikagijonawuliwibi.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/18199243759.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/kugoxevatofosovinide.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/diwoli.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/67791800365.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/54452429963.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109031934236903.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/sojuvajobofijoxo.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/26616925705.pdfIn PDF document text
    • https://servicepapik.ro/files/pelasixijeresamipo.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/pukosomer.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/zunabinuvakakenexolagezid.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/kijoguze.pdfIn PDF document text
    • http://ibb-online.ru/f/file/sogeketipunodekudajok.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/godapubi.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/74235508650.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/23473218870.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/19845739873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+all+version+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_off0000d3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 10556 bytes
SHA-256: be577931f1901d60b631bcdb9d4f894971b2aac2371c05071c8c6aff408f115a
font_02_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 17840 bytes
SHA-256: 1685874467859a1b6a5efa960690421f36bb3bd0b55df6851a2125d57ba708be

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