Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7b01836da7da37…

MALICIOUS

PDF

70.6 KB Created: 2021-09-28 05:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 922ac6d2ed31f2e32217fe22e1eb93ce SHA-1: 839fd63a26f6dde086f19fb5fad5d6889232e2c6 SHA-256: ec7b01836da7da3712f1a75ffce92239dfaf492971326a540cd6e44e755a2bad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many using UTM parameters and pointing to disposable hosting, strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://laborke.ru/uplcv?utm_term=filmora+pro+mod+apk+for+pc PDF link annotation
    • https://hebatkeren88.com/contents/files/zamusetik.pdfIn PDF document text
    • https://tepihtrava.rs/files/96811822567.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/89377781414.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/kabepeb.pdfIn PDF document text
    • http://ks-klinika.ru/ckfinder/userfiles/files/modinomalaw.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/tefebotifudotuwor.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/66099314879.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/fozuxibozejasalepa.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/9jilmso2lksv9cmu4b0115nm30/sizitiladuzemigiwugus.pdfIn PDF document text
    • http://klpa.net/userData/board/file/31876608990.pdfIn PDF document text
    • http://trevorhannant.com/sizinivamidumalifexa.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/bafutodumazaxezev.pdfIn PDF document text
    • https://coombs.gocascadia.com/images/cms/file/wovopoxubexidefex.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/95238520068.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8ce2e390a1f8e38c3f20ed0297373877/67880848602.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/60558223674.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/sawivevusuwomad.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/nujamewomovifukivotavar.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/32107538125.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/95380806717.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/31139238282.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/26864730127.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/rifidodevimatesafopudewi.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_off0000b210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB210 17000 bytes
SHA-256: 64a91fa7ac6c98d4123090a3e3dbb6bd562c45c67465f9c9b93cd2f59d15d657
font_01_sfnt_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 10348 bytes
SHA-256: 191fceb1275a6449fb854d53a734de1e8d7a7372bc56fe65600320908e046e3f
font_02_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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