Malicious PDF — malware analysis report

Static analysis result for SHA-256 beebb624ed68644e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-20 17:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c2f21a35f8ef8e4e8621ebbcb671afd8 SHA-1: dd26b76a3f9ed669b7f6e5fd838c37d04f53dfd1 SHA-256: beebb624ed68644e64d00baff13f7ba92506c0de03bea997487e09b825c19da2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://wastran.ru/uplcv?utm_term=android+cache+wipe PDF link annotation
    • http://teplorium.su/userfiles/file/nedatep.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/64285792982.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/pukivitiz.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/18647873581.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6mrsstegcv22ikhe22b5kfkfqp/52192492883.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/toxesejovidizat.pdfIn PDF document text
    • http://kfgame.snailgame.ru/upload/files/20210901181826.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/1669478314.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab24bcfe2a---74308011714.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/fe69b8ad938fec40073b47538fd7008a/zazelurinemumox.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/99236045395.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/63022139268.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/82669639543.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210902000253.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/lemuwozonuxasewi.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/92559688155.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bcd119ab---78259960657.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/88079494220.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/73307533385.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/74435613114.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/pabudununaxix.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/3975052215.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/mnhr5bclso03jfjf87d6q6gs80/sodut.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/87683563455.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-17/20210917210524949886.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/32482408002.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_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 17868 bytes
SHA-256: c0fe87261d580a9ac1ef1bda55a984549201e11ea7e39385a6a08f141fd75b95
font_01_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 10368 bytes
SHA-256: c0a57205066cc42a9c5308fa8e0c08276e6dc45bcae8d375f55a1a8f6128f8a2
font_02_sfnt_off00011ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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