Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8023c715030ca6e…

MALICIOUS

PDF

89.0 KB Created: 2021-09-17 21:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4917316aad16416bc877c1f6b0caae9e SHA-1: d6238220e53a9a708a092443b1023d4a48e55ed8 SHA-256: c8023c715030ca6ee30669c147023a74e90a1ea270e296fc42a3fb7ec9024a74
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 sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with a link farm designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://allytemp.ru/uplcv?utm_term=justice+league+gray+edition PDF link annotation
    • https://greenline.bg/userfiles/file/18017709015.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/eq0j2c8vesgki8erf0lt1i6ja5/nidesexujodufu.pdfIn PDF document text
    • http://abwva.com/uploads/files/48556805004.pdfIn PDF document text
    • https://pepsima.biz/files/file/xogodofojekobi.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/55990229651.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/funugenitapilamazavami.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/48084510422.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/52682515164.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/78723770735.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/78015583746.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/46438710294.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/3d6fe9d29e25fe3f7bf45bcde78e7101/dufep.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/80764871329.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/soduruvusadurotomet.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/14540716766.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/dufidexuraveb.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6b356c22acdb1a5b1f06191eff6a0653/peboseparibujemapo.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/xivuxare.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/20923085811.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/90693399670.pdfIn PDF document text
    • http://indexone.ru/upload/file/gavavolefosip.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/genekezusud.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_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 19488 bytes
SHA-256: 754194abcc835dfbcd49bb05437c6e90342f5fedd05128f3049334a91b5bfb7b
font_01_sfnt_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 10748 bytes
SHA-256: 0e4932666b845bba78f789aa509d9fe3f6ea25234875a1cc71e5af8477be36a4
font_02_sfnt_off00013cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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