Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ee2e193274c9b6…

MALICIOUS

PDF

88.1 KB Created: 2021-09-15 11:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9389913b1833560ef7051f23d4dcdc51 SHA-1: 172418d02f90a4e2d6c675d2cb855756bc2bd408 SHA-256: 47ee2e193274c9b613be33ea21e25d13b0ee051bf79bc50b0edf3eb904f6b9af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it is used to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cailux.lu/userfiles/files/duwozadabuteberoz.pdf In PDF document text
    • http://klubalfa.org/img/userfiles/file/mekazuredupotumid.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/70091381103.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/63306966518.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/68957710231.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/vufivesux.pdfIn PDF document text
    • https://rubfila.in/files/file/37276942904.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/kediw.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/pojibomelimijefezufoxudi.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/70304930186.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/80166853989.pdfIn PDF document text
    • http://innotack.com/userfiles/files/7753358881.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/demazi.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/nanubikaxuxexemagaju.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/jalajijojojopulunaselu.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/68027104994.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/186941453.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/miririlolozozije.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/moresazatulisone.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/17158754613.pdfIn PDF document text
    • http://chromavials.com/d/files/nivupatexiwapamapawowi.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/sonobizinape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+debug+not+workingPDF 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_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 10444 bytes
SHA-256: 82a6b2d804ecc8f507a182a1b979e86e98c43711a6986a153373ddd6b766a059
font_01_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 18076 bytes
SHA-256: 29a9d40d219fda3d13f643f93cd6e120019193e3b35e12409c36a0d3c077854b
font_02_sfnt_off00013b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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