Malicious PDF — malware analysis report

Static analysis result for SHA-256 b202ad17fa55ad85…

MALICIOUS

PDF

85.0 KB Created: 2021-09-16 04:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d06f389ce8cfd851f4e4998249ca9f94 SHA-1: 1b6d58e80c11e1061a20db3e7fa9c8c419204579 SHA-256: b202ad17fa55ad85388973c46b16ca5d4f9085ce5ab638fc626a2ff1949b192c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or spam campaign. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://eltonltd.ru/sites/default/files/uploads/28984211782.pdf In PDF document text
    • http://esoftland.com/userfiles/file/23854519817.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614235a2bf918---wozunoruxadonumenotajetaz.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zetosatowatesetopiji.pdfIn PDF document text
    • https://12shio3.com/contents/files/68257485690.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/wokaxobejixakatu.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/22630051461.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614296415e342---getopijaravitigid.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/kedovilodusi.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/62368047065.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/27496012462.pdfIn PDF document text
    • https://aashianarealty.com/file/76455385486.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/meronidoduburesudon.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/jumodekunomunoxekogobod.pdfIn PDF document text
    • https://equinox-e.com/upload/files/jinemenerafiva.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/75243578033.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/4317084445.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/sanovumoravuruwalobuxixim.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/zenufosazik.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/mepagoda.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/22199815853.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/68298503779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=design+home+cheats+that+workPDF 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_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 18340 bytes
SHA-256: 13f80569426780fc4c228d85419b1dd34da3009ed73cca3a174ef35a45fbcff1
font_01_sfnt_off000115a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 10808 bytes
SHA-256: 18390ea27914a92eabd8b7ec9d66600b7c80c216de8053c1167c4307c39e1de0
font_02_sfnt_off00012e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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