Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e707d1e49149288…

MALICIOUS

PDF

70.6 KB Created: 2021-09-16 21:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 492b9001e960775a5e041fac37d25f2c SHA-1: f29d3cacec7649896281413f8ab7701d701dcc2c SHA-256: 2e707d1e491492889f6312e753498565905aff1d4afe14a0934112d55c842a99
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, presenting numerous links to other PDF files hosted on various domains. The presence of many distinct hosts and a high number of links suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xn--80aggmy8c6c.net/UserFiles/File/mozigomoxasufuxapabe.pdf In PDF document text
    • https://artinterior.bg/userfiles/file/fokepanubomijakiwiwafu.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/1cf7c0471f96e9630f2cbc3a75f5f463/85097928461.pdfIn PDF document text
    • http://odumakus.com/uploads/files/dinipez.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/25875903861.pdfIn PDF document text
    • http://maksimetall.ru/files/ridiwikavevamikowawod.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/gizobekudezivu.pdfIn PDF document text
    • http://aimic.com/userfiles/file/64937893512.pdfIn PDF document text
    • https://pmms-online.com/assets/file/jojaw.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/34890298930.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130c36c56dfc---48796067220.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/43181549784.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/27982739657.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/gowix.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/moxebifu.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/nojimifodidavaxagejom.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/2717062445.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/80848120085.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/pixodaboduwokumenarawur.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/zigenaxapedasufewetedaf.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/52605631868.pdfIn PDF document text
    • http://enricobarraco.com/files/zefebufapesuxapoveroma.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021911_152945_257.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///motixuduxinolulepamekukom.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/wuwajoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=so+far+away+chords+easyPDF 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_off0000b407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1E 10508 bytes
SHA-256: 3a5298f597706947bf8be4b0b8cb3dabb5ae9258373eca5b1974b491627639ef
font_02_sfnt_off0000e43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 15876 bytes
SHA-256: 811e5f2240fec30d0dc187f3f59a2fbc35ff27d4e4fc135bc1f84255b0e66928

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