Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca0b7db8c329992…

MALICIOUS

PDF

72.9 KB Created: 2021-10-04 05:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd503a3965bd82d972c7ab820f7ccb7b SHA-1: 2841fee6cf489ba940387a4c54c46e78fe2adb43 SHA-256: eca0b7db8c329992c86c936ee804185f403ae705cbc379a6cd4530e3075da3cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to potentially harmful websites. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest its purpose is to lure users to malicious content. No scripts were extracted, but the overall structure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=qs8006+rc+helicopter+manual PDF link annotation
    • https://tommytest.dish1314.com/data/html_editor/files/59882060404.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/26236162748.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/20607902585.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/41162007640.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/42824273444.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0b55829a0e383901e47d6820a754cda1/piberired.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/6906497978.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/82055511432.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fd9de806be84f530519e33de7958fb74/36732309429.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/remikejagejada.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/boa5756kra1t5pb31vo3dptqaj/kewefulajoloxosagogon.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/fugemumojezukegul.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/8896143589.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/98157047083.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/28884930886.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/27800535800.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/64064623728.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ia7vqnrpctu76stuv6ese25je/41608847441.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/mobixejifanubekal.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-26/20210926215539579142.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/36522275513.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/90834444026.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/42785741558.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_off0000b656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB656 11296 bytes
SHA-256: 4d8081ddc24174554ab6e656d68a42c2a68fc96e5f3814811c5ce101ab82781b
font_01_sfnt_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 17688 bytes
SHA-256: 89e2494c581678e01c9970314df3956beb6f3839838a713bac935eb4ebb3ad1d
font_02_sfnt_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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