Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0af35f9e7bf99c…

MALICIOUS

PDF

76.8 KB Created: 2021-09-20 08:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3bebdbf2efa3ccbe2cb7c79c99fed45a SHA-1: 9ae37dd2138a28d5d9c485f337e2dcd5a2d6b9d4 SHA-256: 2d0af35f9e7bf99cc4e94ec6796193c5b06c338e50672916dbe685e2dc92fd1f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document is designed to redirect users to a network of potentially malicious sites. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://misterholidaysanprisco.it/userfiles/files/58519862788.pdf In PDF document text
    • http://le-bouquet.be/userfiles/files/popixosebimesivoga.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/88680146740.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210917020454.pdfIn PDF document text
    • http://topas.lt/userfiles/file/179711042.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/tebodoliboxepavurate.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/zisuj.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/pijetamewozekiluloxevini.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/saxekenefo.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/9207132176.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/xawivemugomanematis.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/lajupegekifi.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/35842100892.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/losas.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/dinetoletiboluwo.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/dupabuba.pdfIn PDF document text
    • https://synersys.fr/contenu/file/93294876719.pdfIn PDF document text
    • https://artbynela.com/uploads/file/jejazi.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/29146654263.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/siminipe.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/xasibuzeranoxi.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/68706955570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=little+big+farm+mod+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_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 10756 bytes
SHA-256: 62c1a8e9f28e632901e5b7cf8ebf3903820166ad7e3cf265c786da31894a7ffe
font_01_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 17396 bytes
SHA-256: 6b1793e2f1a2b7e737a5268e78cec6f36a0fb1f611f5a9aaa61bf1ff0c10b191

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