Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2204527315c823a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-13 21:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3d28c5d92144863526375e8c695d0957 SHA-1: 34cd1b151d0ec43075644663407fc5e2b1f92ad3 SHA-256: f2204527315c823af4c50ae1e34c82f1374c4601d0b7692b3aad8fe036a80a8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains numerous external URIs and links to compromised websites, suggesting it functions as a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions, further supporting a phishing or malicious redirection scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://inwebjor.ru/uplcv?utm_term=current+issues+and+enduring+questions+12th+edition+ebook PDF link annotation
    • http://banner-ever.com/ckImg/files/3660869122.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/waxividixabap.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/05k9d4ip19a24elfb87u1dcdu7/wegadabepumuvotosunonuvo.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/boxezavapu.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/nogisemugixakugerope.pdfIn PDF document text
    • http://wenxuezj.com/images/File/32370090783.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136bb9f2f343---ragikutavavi.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/19638272302.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109051350364066.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139dd7da8337---70124182929.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8e9a4da1---81415900157.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/88052930826.pdfIn PDF document text
    • http://julianina.de/upload/file/31545673579.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/deruzezupefumise.pdfIn PDF document text
    • https://alohasafaris.com/files/limigoluxi.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/fufiwaxanoxutir.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/88310564674.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/tolixekugatureru.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/1077118856.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/84670635931.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/babilapalobijujedakuta.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_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 11164 bytes
SHA-256: 6941ca385a34f66334a6a197ef22facb54f33a90b910985de56b9c2b2fedee41
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 18216 bytes
SHA-256: 33b5ac6ea344d628cbc0e2b525a26c5045fe99ad84c254d6cb7721d3c23da231
font_02_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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