Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a0d46b8fd7e1f7…

MALICIOUS

PDF

70.5 KB Created: 2021-09-28 21:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05279bc42baf833ae5d2e7ae28f5aab7 SHA-1: 194c34a85a1f9993147a7129b74221ae48cc6d3c SHA-256: 47a0d46b8fd7e1f774bddc8d0cf3af8739744a1978cea5dcec7d26f41496ca0e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://3mfa.com/images/editor/files/dolonif.pdf In PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/35720691240.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/87056461656.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/novajofavunuretuwumalo.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/bovegewetap.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/lasamubawapanopotevilakiw.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/mofuwor.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/lazogasonumunerepobaw.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/61880078060.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/fubip.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/wizemapuvam.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/80746810187.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/gewabirojebilajowe.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/nebukib.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/sufoxavoxibosit.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/matejazenarokug.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210912000615.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/45375076385.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/porozisezasiwatafeka.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f2vbuerbgpdo06a3eanibucqie/10674513425.pdfIn PDF document text
    • http://ipllaser.in/uploads/zavojeg.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/23557393789.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/13055501463.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/zitefujete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=download+lego+star+wars+apkPDF 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_off0000b28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28B 10656 bytes
SHA-256: 87ed7f749f5e1b6aa94ef99c4b868cd6888a960d953ed4a2698e9e055a90e4ff
font_01_sfnt_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 16408 bytes
SHA-256: 48dad22da37a5f467a13219f0af0d154505d6c9ddd0f25e532f16785060c7d66

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