Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f1c0f403418e6c…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 01:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: beca96fdbbdb3707a70a1cf7539487b9 SHA-1: b629f1ce5086f8221bd5b0ff9d0d5d2ba26bb996 SHA-256: f1f1c0f403418e6ca47191e124c6e48e735e94226676a4a85ecfa8e1b31e8bb8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many pointing to potentially disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or initiate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://sibaco.ru/ckfinder/userfiles/files/gesimipovabanenafarok.pdf In PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/talexetibezijux.pdfIn PDF document text
    • https://combrooncom.com/contents/files/93620243232.pdfIn PDF document text
    • http://boldogelet.hu/media/vunikigegom.pdfIn PDF document text
    • https://heyratacademy.ir/file/31309414203.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/subabekixikejoso.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/libewutatimuxarisilunenor.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-14/20210914175715798564.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/34207084519.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/82640077934.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/nizoxoduperutojub.pdfIn PDF document text
    • http://kbchina.de/upload/xazanibawusigukureveb.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210925124537.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109262131176262.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/nopawazevemufugobavuba.pdfIn PDF document text
    • http://gnox.vn/upload/files/gexuwomupuw.pdfIn PDF document text
    • https://buka.ru/sadm_files/rawunume.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/jotuxenadufomelugonaro.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/fipimokepaxofuvijipamaba.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/kodokotilegirosiluduruwor.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/86349157126.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/xorazefoburapun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=root+toolkit+apk+motorola+one+macroPDF link annotation
    • 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_off0000ae99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE99 10504 bytes
SHA-256: 59e5347f7434bbaeb55aa0bd641cf3cd3ec13b0722595d44966aff75dec5839d
font_01_sfnt_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 14540 bytes
SHA-256: d55f7d40b425f52e53e14ed3ce092d1bbe6da59d32433a03deabf0565d9bd673
font_02_sfnt_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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