Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe9058a520bce44…

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 21:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e60b86d3d84f495ccfa93b2272eb0a20 SHA-1: b4862ea45a0ef38b96e7c224e8b01a4693f71bbb SHA-256: efe9058a520bce44718f792ecc5c01a193010a0a17f2c90c474018d268f036a2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=how+can+i+know+the+wifi+password+on+my+phone PDF link annotation
    • http://gpkoaee.ru/ckfinder/userfiles/files/moxuzipim.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/92074497610.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/844dbeef8182d31969997f10b30fa90c/ragejuxik.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5affe2ad3---28790891777.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/jonigogikefaxikekurelire.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/gejamewewasuwepasezojikew.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/48740128755.pdfIn PDF document text
    • https://mackbeks.com/files/file/74796441013.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/burokujisezofaputok.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/97171922002.pdfIn PDF document text
    • http://kco.su/userfiles/file/25579757646.pdfIn PDF document text
    • http://saimiri.name/upload/file/73124296068.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/jexiluvifamiga.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/34771125309.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/getevusulifofamidox.pdfIn PDF document text
    • https://kapefashion.com/files/files/83737045694.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/14897060945.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/95215824077.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/pujuzekarewug.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/68021756303.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/68049740961.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/1889172391.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/popibipomorezinun.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_off0000af07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 16064 bytes
SHA-256: e86edbbaf0936c8072eecbafb0b17c87eceec8634049d25d8de0b3f4c8a92456
font_02_sfnt_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 11124 bytes
SHA-256: 1e380f3440017c287df37cdf99e17d51553dbecd985d4391538e908fb4ea183a

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