Malicious PDF — malware analysis report

Static analysis result for SHA-256 5294e242ca424cdb…

MALICIOUS

PDF

106.2 KB Created: 2021-09-16 08:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 265116429dcaa46df8b5575ba3425653 SHA-1: 19a3a70ba7f17fc0b65acd6ef2b84f5ef5b6ed6b SHA-256: 5294e242ca424cdbb29f7097f91d9023b01649b27227e4d349881b71fd404e6e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to various domains, a common tactic for link farms used in phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.brickchamber.com/ckfinder/userfiles/files/41060879060.pdf In PDF document text
    • http://hifitness.hu/userfiles/file/petavipidebebuxogo.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/35031705993.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/zejuzajinute.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/9712727246.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/37156302950.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/lavev.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/74733531102.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce3bee40c8---tulezubewadiralesik.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/ziveragam.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a2474c92d---2374328726.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/44656524909.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/72539149660.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/36705744158.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/gemozagabegevofijomokal.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/torus.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/96901190851.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/jenimafexalovujorov.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/podesatikusepisakerib.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/20781689544.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091416582628.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/fapepotijobawafuroxo.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fedujobidajiligobavilijis.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210905153145543.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/55138082502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=battle+z+super+saiyan+mod+apkPDF 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_off00013583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13583 10972 bytes
SHA-256: 6d75b3ce859b3dd0afde999a68c7fe807f9dc4723305cc5fd3cb69dbd85807b4
font_01_sfnt_off00014f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16722 19856 bytes
SHA-256: 872f094b22cfc2fa3ea556667c2b70c60916c9eea833f8eb1cd82b955d47ff07