Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e24d2cb3b0d665…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 21:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 00e4b9816c3280f81c09b365cfb80935 SHA-1: a033b76c471c2181162298eeb2d4f7592221a78c SHA-256: 97e24d2cb3b0d66572a2c47b2b333910804a0679f430e8b070cc081ea3817a46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised WordPress installations or disposable domains. The presence of numerous URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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.
  • 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://chcial.ru/uplcv?utm_term=redmi+9+prime+vs+mi+a2 PDF link annotation
    • https://mimpiindah1.com/contents/files/sukisitotiwipasuradanevej.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134413cab474---21501712034.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/ronaxinigibij.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/punelakubo.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/xemobuvoli.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/xovijolozulesowategulopu.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/tosopif.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613971681a785---59863057480.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/xoseret.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/tevupidonika.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/770c9ae809b83058704b1f6cd047fe17/12454039785.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/zudepopivob.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/917365669.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/2601622636.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/48882432428.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/6801542819.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/28101293481.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/goles.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/panutigeregolejalen.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/33532777912.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/51849417980.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161477387908a5---7597592440.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DF 19872 bytes
SHA-256: 8c7d0726eba544d6dc8182af5a58111eace1a154819259d1f56f6ba92720bea5
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10584 bytes
SHA-256: 924d1c58a7bf8ba346f6e38b9e1731c2533fc283e1e2f57650f81c78765dd3a2
font_02_sfnt_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 17468 bytes
SHA-256: 2b7310ccd218a29eb0c8751da6165bd5dfc0efa9c9c9ec64cc3710bc71957776

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