Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00f7c16df311f58…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 16:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ff0e8d72abe373cc17e56f4e3e324081 SHA-1: 6bcd3f51385a3509ee66aa5efc3bed43e1737a5b SHA-256: d00f7c16df311f58f1ed69b4099d7bb1ea541fd1893f14bba6f54cb872d2aaee
146 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based interface designed to trick users into clicking embedded links, which likely lead to further malicious content or exploitation. The presence of numerous external URLs, many pointing to PDF files, suggests a campaign distributing malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://csodamalom.hu/files/files/84983469840.pdf In PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/relodemagonik.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/50930846498.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/54966816517.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/10319176226.pdfIn PDF document text
    • https://asken.as/bilder/file/wizesitud.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/viviravudevojanikumupiza.pdfIn PDF document text
    • https://www.suep.gr/ckfinder/userfiles/files/lasurilinujolop.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16140b35d6940b---dabovubu.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/40421367129.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/kakilarazejenuvopazusu.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/ruwixis.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147243c68c9b---monomifokazabigeba.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/43153104463.pdfIn PDF document text
    • http://alidongdong.coco1490.com/upload/file_folder/file/92000951637.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/55432346369.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/82808174459.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/39469071632.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/15711154092.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/62120428540.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/8394787946.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/rumebubufuxasubamir.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/tevaxojosumujebe.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/bozikamizesokubenajifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=free+football+tv+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_off0000b118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB118 14032 bytes
SHA-256: 0d20b941785c559a6d7f22f3dce38243b16e506d7494f596f0bde6500c5caf72
font_01_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 10264 bytes
SHA-256: a442368aaeefdd7889498c5a15d684c2f697e69e88fa3e32674447328c1cac87
font_02_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1