Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cd08949fb0d8be…

MALICIOUS

PDF

76.7 KB Created: 2021-09-17 20:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4a1e567f2f5d229a02f03145d1f6400e SHA-1: f7d19c708a664d61bd6cc7f2ff3b510a4045a387 SHA-256: 32cd08949fb0d8be6428b834fc1e8bb4e8186d9aa835256bc747ffd3f50db997
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'garglob.ru' with a 'jack+reacher+2016+english+subtitles' parameter, suggesting a lure for potentially harmful content. The PDF's structure and the presence of embedded URIs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=jack+reacher+2016+english+subtitles PDF link annotation
    • http://maysoi.com/hinhanh_fckeditor/file/61459924402.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/nupimevuduj.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/surilesekawawenumatuze.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/62818157874.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/36104488947.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/vevolinebizeza.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/10830381193.pdfIn PDF document text
    • https://questyme.com/userfiles/file/51701421403.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/muwanifuwub.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/nemifup.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/66033458361.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/40187238266.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e2c82f0ea78cbdc66e8a534ed0ec35b2/4651472171.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c432c6354---2331952973.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/saxudimo.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/patuzavemekajasifim.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/48805304787.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/78624660986.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/6248402363.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/fukivaxixerufudowere.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/nizedowafetisod.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_off0000bbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F8 11172 bytes
SHA-256: 69443d53a22671b1888ec4617e1df5a24929bbff84bc6818e8bbb38c37a27710
font_02_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 20824 bytes
SHA-256: fcd3512f56494dd387a28bbb7958414f5908f1ab4e6cf55d442ad75b8069056a

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