Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93405310902942b…

MALICIOUS

PDF

85.2 KB Created: 2021-09-21 09:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e7ff36c2e088475bbcd5c79a606f5951 SHA-1: 0742852d530124673c907b81bbadbd7d3dab1037 SHA-256: b93405310902942b2f2d0b8821f489ed64c118fba40351507e5b6ee66c1c169f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one that appears to be a link farm designed to redirect users to potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The presence of embedded URLs and the overall structure suggest an attempt to direct users to external resources for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://chcial.ru/uplcv?utm_term=snack+vpn+apk+download+for+android PDF link annotation
    • http://24horasnoar.com.br/ckfinder/userfiles/files/86544323936.pdfIn PDF document text
    • http://sayarbobinaj.com/file/66011197714.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/liniwipex.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/681823309.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/47684679270.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/kabezer.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/20103786252.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/59136187884.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/86286210620.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/zavoxujefumokinitebano.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613389190338e---5096707402.pdfIn PDF document text
    • http://woykoff.hu/upload/file/32926493095.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/13172964848.pdfIn PDF document text
    • http://www.polni.si/Images/files/virefetuwetegutunurubuj.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/vuvakokuronofa.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/87361784783.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142c3ad49a27---lowinire.pdfIn PDF document text
    • http://szwygs.com/upload/94233430046.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/91922530036.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/forojixesewazuxara.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/99666287209.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_off0000e8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FE 10536 bytes
SHA-256: df09a65ac1daf87c25296e0642fc38c35e2dd1e07b2e76e813889b9351708552
font_01_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 17664 bytes
SHA-256: 3f39a329b221384e964751e065677a2441a160211d4ab7a6545456afbae3ef54
font_02_sfnt_off00012ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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