Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb954aba8c4984d…

MALICIOUS

PDF

127.0 KB Created: 2021-10-16 01:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 48cab33a2b93cba35d6b042b56c489e3 SHA-1: 1b0f437940a9443141d346cba313dbea4f56a259 SHA-256: 2eb954aba8c4984dd384ef711272562ffc47f12a7870c6e601ea927813dd8c1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to distribute malicious content or phish users. No scripts were extracted, but the overall structure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://gitimohammadilakhimpur.org/ckfinder/userfiles/files/danoxufotijol.pdf In PDF document text
    • http://pytextiles.com/userfiles/file/tojetelateburenasopo.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1614b95a19d4f2---50117470320.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/dopilusejaziwazilokitel.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/vupawusowavisoganar.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/27580012610.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/dofobomogemisewawevanesa.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/zegojekuxuzo.pdfIn PDF document text
    • http://diepdoanhmetals.com/media/ftp/file/16826108316.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/90387769078.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/birufedazodufasowulim.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/30046155052.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/12015534035.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2109211330045602514w7akcasozr6.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/jubepebolivanijir.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/18154386539.pdfIn PDF document text
    • http://ahchala.com/img/file/15810577555.pdfIn PDF document text
    • http://profstil.az/userfiles/file/serovu.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/84249845947.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/jomizepinetikumiroxukixed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/2I9n2o-U8HI/uplcv?utm_term=best+your+mama+so+fat+jokesPDF 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_off00018d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A592 10620 bytes
SHA-256: 95bbdf362b954357746deb723d23862ef22cce50a7515fdf233c3565884dd8c3
font_02_sfnt_off0001be0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE0F 19068 bytes
SHA-256: ce1cf032e38b4b159bf12edc230a1dd57cc9893d823719bfe53b5bd2df152589

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