Malicious PDF — malware analysis report

Static analysis result for SHA-256 294578107dab7c6c…

MALICIOUS

PDF

86.1 KB Created: 2021-10-06 10:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1faa66e78bc71391174c6e75aece2a9f SHA-1: aa73bc7e4ba531a6be6b5a78d774c7f88bee5960 SHA-256: 294578107dab7c6cf1f3213d536f768b6cd70c7b7b17981ee0ae9f44fc48f992
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the structure and URL distribution suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://orthocarecentroortopedico.it/userfiles/files/pigiweze.pdf In PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/nunogekowosaw.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/rutegasoxalixumife.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/7885746701.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/92029559354.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/37895541080.pdfIn PDF document text
    • http://speckrepej.com/upload/file/95343777352.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/pavutifarasejepemo.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/nolesevosofugona.pdfIn PDF document text
    • https://hirurgija.me/files/jofozogemoroxagas.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/11212942097.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/43241501910.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/zovusegajademaxewopo.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/piwilelafekefubutikojik.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/paridaw.pdfIn PDF document text
    • http://sro52.ru/uploads/files/49986748890.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/zojobuwazebum.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/vodevaxozude.pdfIn PDF document text
    • http://donghotam.com/luutru/files/tupogaforoguximetojogitog.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/2554652575.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/4d84b30fd969fcdf09beb743fca1a09e/zozovunapigumudutiwodiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+holds+an+ionic+bond+togetherPDF 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_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 18184 bytes
SHA-256: 1e966067e372438bc1249e110232305b69a42e112e24bb3c2614a3e0e38cf198
font_01_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 10780 bytes
SHA-256: a703cf4ba41fe43833a4afcdb065283d38c68d3cf83a4cebb0996de8480aa3f6
font_02_sfnt_off000132ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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