Malicious PDF — malware analysis report

Static analysis result for SHA-256 c026ce6236e32cf2…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 01:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eaa66b7e4a907d01f0316a18af56371a SHA-1: 0b2021cde3d3421a00a436861374144f04af28b0 SHA-256: c026ce6236e32cf2f33b90b40f27a84854c97a9beca89fd350afbe92baf6bd6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to potentially malicious PDF files hosted on various domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vivaibonomo.it/userfiles/files/71195990910.pdf In PDF document text
    • http://fmi.lu/userfiles/files/ravedenebeboriwu.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/33340378789.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613041db3fdf0---zuvomorilovojufomafojuz.pdfIn PDF document text
    • https://betsin.org/userfiles/files/38711603422.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/renowebinofuxewegujepe.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/nanukujifonutadejibi.pdfIn PDF document text
    • https://eetravel.net/file/15801648540.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38919424243.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/37856373423.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/24647935630.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/24248793179.pdfIn PDF document text
    • https://cmf8.ir/data/file/gepir.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109061344259019.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/batovini.pdfIn PDF document text
    • http://trieuduong.com/images/Download/35415374126.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/89878433459.pdfIn PDF document text
    • http://adice-area.com/pictures/files/dujebajemawusi.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/ravutol.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/figifadazinirilu.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/50892021183.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/45926391434.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/21698509183.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/940abc5dc093aed965e8ed0c3660b9f5/62684043104.pdfIn PDF document text
    • http://haphadoor.com/upload/files/zoruzeseruretazifadimeno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=download+siri+app+for+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_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 10348 bytes
SHA-256: c01def0185be6c3fc8da6e220e937ac8d25234f18da2c45578cb39f44a217d5f
font_02_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 18424 bytes
SHA-256: 08d12dc418bbef8c9606d934e02e122f19daf9a38b75a01033638b19ee915c19

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