Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e02f9b48b432d64…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 12:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4b19f893b1eb33c15b80d88ccc319d5f SHA-1: a0f8e40360b9ca2a77584b743780e6cae806d9bf SHA-256: 1e02f9b48b432d64d3545e0548cd4d3d4717997aca57f59d4f77579c0057bccf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to potentially malicious domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ratchee.com/ckfinder/userfiles/files/91334980711.pdf In PDF document text
    • https://sgotomotiv.org/upload/files/82187777457.pdfIn PDF document text
    • http://surausa.com/uploads/files/62299329577.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/jurudadegiz.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/nuretovamabejufaxo.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/98191359628.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/kavipimikasifipapef.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/17663620617.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd550eb352---kalatewejimarozukugugup.pdfIn PDF document text
    • http://regmac.net/userfiles/files/94383985735.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/gobigutevewaw.pdfIn PDF document text
    • https://paintingwithapassion.com/nbloom/fckuploads/file/moguv.pdfIn PDF document text
    • http://nincity.de/inline/file/fibamobejikal.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/fofilexabigamolanijakip.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/82015540909.pdfIn PDF document text
    • http://soc-in.com/data/media/files/3823087939.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/73136854221.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/zekawifopidanowi.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/55989049130.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/64230397061.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/58373600820.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/kitikefupixulimub.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/3711331628.pdfIn PDF document text
    • http://dges.in/userfiles/file/datuzes.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/44513272393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=best+free+video+recording+app+for+androidPDF 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_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 10868 bytes
SHA-256: 8116cda52f9f3170970be7c57e49c61e92dac65fd320af0d26af3ec09f3ff1e1
font_02_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 17584 bytes
SHA-256: 84e1645d0d99d74ad0a8963e654b1b1e624b11078c348e9c1202470cada15140