Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b2fa37a989c8e1…

MALICIOUS

PDF

92.7 KB Created: 2021-09-19 10:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7492e0dce4f77f3ac1a4154ecc6e5b7f SHA-1: 7d263805413494cb337c2f3890e3e493032a462c SHA-256: e6b2fa37a989c8e193567969fd1b4aa6b93155854cab522496b0c563d0a24faf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or redirection attempt. The PDF structure and embedded content suggest it's part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://nomylo.ru/uplcv?utm_term=prototype+1+android PDF link annotation
    • http://bakefruit.com/uploads/files/202109040612588792.pdfIn PDF document text
    • http://chenruichem.com/upload/files/28586206370.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/jovisulokofas.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/nojewe.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/xevodaz.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/sidopumufonelafunap.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/lozedosakoxuro.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/10161526314.pdfIn PDF document text
    • http://zamgph.com/uploads/file/07113107393.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161301ee842f72---18883741712.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/milukaponosikorudebaguri.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/gakiviwagukozi.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/20092090306.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/numop.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146d421be92a---75518372879.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/gatiwojinu.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/12735832366.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/69020755791.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/19871069908.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/64851084044.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16145b207b0867---94863314584.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/18032815564.pdfIn PDF document text
    • https://areicon.com/images/file/golenipake.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210913180902.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/devirusajelitamidebi.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_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 19108 bytes
SHA-256: 6cd9a1550a48545eefa89db4389784554b316980543e4afa2784a9a9d521dcf6
font_01_sfnt_off000135da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DA 10340 bytes
SHA-256: 6f9a4551df23ef5015e8094a2330644a9874bbc7600e6367746586645311e398
font_02_sfnt_off00014d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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