Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e54364d3f0daf8…

MALICIOUS

PDF

74.3 KB Created: 2021-09-26 01:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a4c6474d68954639742aaf375348cf1 SHA-1: 65e253bb10284ba4a4e55718360c0288fc23cb24 SHA-256: f7e54364d3f0daf87d92a9e169e89fa99c7f806a28c5b6371753981ddd1c2734
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic analysis identified it as a link farm with numerous external URIs, many hosted on potentially disposable domains, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of many embedded URLs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://j-club.eu/userfiles/file/87070384192.pdf In PDF document text
    • http://mawratanews.com/armedia/uploads/files/22632573141.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/10729302852.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/71669572294.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/21516706009.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/lugelajo.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/81803553514.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/6a103ae2fcbf1f96582d1c4e75f9b355/12790766441.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/73499609447.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zefare.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/pivib.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/53702544902.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/pezamug.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/15563266130.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/52db404a2fbf49138824ddd2fdb55f91/47666234103.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/rajipulaxenobilegafonexad.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/80946267521.pdfIn PDF document text
    • https://tdfstore.it/file/60051848821.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/duxikatoviza.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/54681317481.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/rugamekozezunovapam.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/66980992171.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/tifino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=airdrop+con+androidPDF 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_off0000bcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD7 18788 bytes
SHA-256: cc7d4f2d752b276850a85c680728c41e4dea92f0326dc2bd48d7ad9670686b13
font_01_sfnt_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B9 10044 bytes
SHA-256: 22bf85f9b7246da3c1fe17170d965f9f512e5e2a902e692e920cf2bfaad36a05