Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce235ebd501c6df1…

MALICIOUS

PDF

87.3 KB Created: 2021-09-18 16:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4596ff0cba4dbd7f46ea877f9d397e59 SHA-1: 62b0e6716b54294573ff0e7fc6e5cbb537ad1266 SHA-256: ce235ebd501c6df1b0cca47a77c3caad98c4d7611eaca3541e56723a16677053
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, and one directly linked to a search term for 'icloud activation lock removal tool free download'. This suggests the document is designed to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=icloud+activation+lock+removal+tool+free+download PDF link annotation
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/47332102a30367fa603e40e2db64cb16/xijogiwulowager.pdfIn PDF document text
    • https://beltamas.by/content/Files/48211694747.pdfIn PDF document text
    • http://full814.com/upload/files/72312416741.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ff6e0906a824b363799fcd5b873adf6b/61089761340.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/5193846756.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/21900966959.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e48adb0ea---libifolezekopedifubovata.pdfIn PDF document text
    • https://teater77.nl/userfiles/file/wulege.pdfIn PDF document text
    • http://carywinslowlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xirefefukimudif.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a96bb30373.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16135c9fe38f8f---gunirowalir.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405b6d23ac9---joditadomutewoxusomew.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/goxopokuzo.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210913_1B5C224E434C33D9.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/74336839403.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/dujixit.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/kesigenajavimukuzodilitul.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/96277463570.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/xobamulokijijulu.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/91398842044.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/zimigepenazafi.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/kawilakavevakosadakewaxak.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/38712570238.pdfIn PDF document text
    • https://songhongresort.com/img/files/tefazoxaguvefanenosodoga.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_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 18348 bytes
SHA-256: 40a22d66b685ad2140c29e7d1a05119c11cc0a156814914b8850d36eb35a145f
font_01_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 10764 bytes
SHA-256: 1cc533d6fc22244c49505766e63ab75f81ae5e98d6d61db5d52fbb3e7a73a58e
font_02_sfnt_off000136f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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