Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a4294514057a30…

MALICIOUS

PDF

88.4 KB Created: 2021-09-18 03:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c37041994afe728133201f94fdaf40fc SHA-1: 92533185b7f2b56512db956b5dbc7b97261fb97c SHA-256: 02a4294514057a3020fbae37059173afc3eb7817f72b420e7b066f8b252a6ad4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, with a critical detection score. Heuristics indicate it functions as a link farm, directing users to numerous distinct domains, many of which host PDF files. This pattern is commonly associated with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ichibaninfotech.com/ckfinder/userfiles/files/vuduzizonoxevitisuw.pdf In PDF document text
    • http://ros.by/ckfinder/userfiles/files/junoluvuvuxubesu.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/81460051299.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/topibesavarofesudigipetig.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/dukapefusitafogepuvumu.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/verosazatutapevira.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/81502707799.pdfIn PDF document text
    • https://bursac.net/userfiles/file/12347365237.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/47434283201.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e23ca1e0a1---wukojasemevogogutesujo.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/84338949307.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/95223042954.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/pibunulum.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/28171738446.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/milusezib.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fisapalom.pdfIn PDF document text
    • http://dakmet.pl/upload/bodatediki.pdfIn PDF document text
    • http://cutskytools.com/d/files/46716014050.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/kupoteveridimamelexer.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/92081342324.pdfIn PDF document text
    • https://eniedu.com/data/file/20210910060620.pdfIn PDF document text
    • http://wami.cc/data/files/92948369791.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/34555863854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=a+case+of+identity+pdfPDF 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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10560 bytes
SHA-256: c011745cd5ad8c1d792df87ea35f9930d8832e086287fed36f4c530349ac8df7
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F42 20224 bytes
SHA-256: 89cb0edee7c97e8f7163cf2087e648329d10bdae30332dc343a1895e25f29a35

Open this report in the interactive analyzer, or submit your own file for analysis.