Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede0acc957066785…

MALICIOUS

PDF

108.9 KB Created: 2021-10-09 19:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 17794014c1d7fd0407e586491dc87587 SHA-1: f34d06f985c525e0fa71b009d93dbec28b52c099 SHA-256: ede0acc957066785d0ae91b5faff28c90f8b4dedef7cd3477bbe733766a1bf7c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://laborke.ru/uplcv?utm_term=word+problems+involving+conic+sections+with+answers PDF link annotation
    • http://vietcem.vn/public/default/ckeditor/files/68691309113.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/54819451100.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/5a13fe7600643618f8442239bc452a2b/73327619934.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/41001097977.pdfIn PDF document text
    • http://inspeq.eu/public/files/wafexorituripu.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/44014127359.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/nogoweriretiditokizefataj.pdfIn PDF document text
    • http://budget-pl.com/ckfinder/userfiles/files/68910816706.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/8856427521.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jotatiwituxijawuvil.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/jovoziwinum.pdfIn PDF document text
    • http://benjapakee.net/UserFiles/File/duxomap.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/28413982879.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/ronoze.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202108311902138139.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109140417597030.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/witokoradorexodizupu.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/varonapinifet.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-14/20210914070815517131.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/70247988928.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/9371650527.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/bidujewafe.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_off00013b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3D 11244 bytes
SHA-256: 99fd0476e00fe4b4244001e36887571b6aea9554fad97165ac20863550ba4022
font_01_sfnt_off00015502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15502 21672 bytes
SHA-256: 28f3619c08a4ebb49bf0a3e85eb3987dd310bcab8b415c064a01284d99c1ecbf
font_02_sfnt_off00018d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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