Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcc587f17f3569e…

MALICIOUS

PDF

102.1 KB Created: 2021-10-11 08:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe020a2c5832995b88af6712111ab9b5 SHA-1: 7dd2dfd8b56ff8dcc9548dcb0e730d3d2074fbfe SHA-256: bdcc587f17f3569e07d4dc52287acd20bae082b46e9aa73690b66e9947475ab5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains and some using IP literals, indicative of a link farm designed to obscure malicious destinations. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=moon+river+song+meaning PDF link annotation
    • http://live-net.it/file/81365855063.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/vokedubumepigugejorerate.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/5894442512.pdfIn PDF document text
    • https://whitesal.com/data/images/file/4101_20211006052007.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/dunekawal.pdfPDF link annotation
    • http://sushinamu.com/uploads/files/piguzizovatuzezezes.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/70010940868.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ca393e7d12e505a4e058f969c9438381/2097626497.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/49006977533.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/bumeladamoku.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/gotajenulufawuxaj.pdfIn PDF document text
    • http://unibox.lv/files/text/telajefiguzijafetumezuf.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/sezazusunatabolom.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/rufudiveduve.pdfIn PDF document text
    • http://wjcopy.com/upload/files/79454437888.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161628bb5d4181---menigonidal.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/74375097115.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/fafagapirawopiji.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/mazurigepanu.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/9962138229.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/10321932638.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/wewemuxodanofirur.pdfIn PDF document text
    • http://www.moulbaix.be/fck/file/72395782630.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/kejolimor.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_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 21776 bytes
SHA-256: e894a6564bab752748b23ce37a54d26dbfadb2bc809fa3fc4010cf1ea67b1187
font_01_sfnt_off00015b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B05 10364 bytes
SHA-256: 356fda9b7d7a97e658d681d5393ac5fa5fbf26ba36eb54511aacbc56fa525fd0
font_02_sfnt_off00017275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17275 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1