Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee02fb746147bbf…

MALICIOUS

PDF

81.3 KB Created: 2021-09-05 13:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 26aca895c9b98209a94eb804f2d8f5f9 SHA-1: e45153976915ef01c9679d68d866f97e98ba039e SHA-256: 4ee02fb746147bbf3ed35d0d4d16ef4bd456a66980ec9f7f35144374d55c764f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://avenue102.com/uploads/file/nezifenolow.pdf In PDF document text
    • http://jtour.vn/userfiles/file/11670071219.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609883a340a66---kowuvuwawugizulisomogam.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/07be7abe94697eeea41fd380ba10e3e5/fugawuxubowo.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/vodejixumozovarus.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/77759650554.pdfIn PDF document text
    • http://moneymaker-gold.de/files/megumibasarofopur.pdfIn PDF document text
    • http://prmakeup.com/Image/files/83495761199.pdfIn PDF document text
    • https://ka-base.no/images_content/file/wuruxanis.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/11a7f2a94067ddb8f29ddab0e2a63ead/68176716309.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1724f2a52ac293a3fe4c056b617241b4/gotowomilatepa.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69eaa7bd8a---50504815247.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/07b0ff0189d0ff41deee9f3dfdf3f105/45122442058.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/66689492811.pdfIn PDF document text
    • https://ivanamihic.com//files/7098548003.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/bee4lj23ugprqh288d6to99ht3/dekerelidivari.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7dd34736c---pelejaxasiburefosot.pdfIn PDF document text
    • http://chinahongji.com/d/files/5479853474.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba528de30d1---17846516794.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/48139648363.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/162899358755076827571.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/30028961549.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/fakepivibedomin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=overhead+door+legacy+496+manualPDF 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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 17484 bytes
SHA-256: e52b976ea8aa66be1ad8232e827db03ae74fb7ace71dc7b3d7fc0833940b8dd8
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E45 11180 bytes
SHA-256: 7352241774ea393cc6fcf725b022672aaec0835933f9e78269d148459ed99959

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