Malicious PDF — malware analysis report

Static analysis result for SHA-256 62693c32eacbf2ad…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 12:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11f023394324600a3f8e8d1a5d9c3868 SHA-1: 50404eb55dd4d9f4e98ae5597449aca7db550f18 SHA-256: 62693c32eacbf2adb002fb615cea562c255af6fe047245981ecef8aee33703aa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or domains designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The document body itself is largely unreadable binary data, suggesting it's not intended for direct user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://circuitvietnamcambodge.com/hinhanh/file/godesigevedepelik.pdf In PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/96746149444.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ea53b7ddbe9ebe3821c5e8959f02e4a8/vosegizusaf.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/3922310901.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/fifipiwelana.pdfIn PDF document text
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/60c5707573fc018cc526b95a7be91708/65389650587.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/85179508356.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/62763095838.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/wogokogeronewumasuxozog.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33992403938.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/16289325437.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/as9n6iee62o0nkihstqbli0q02b0g71i/33813472258.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/zenivejomoga.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/46308681896.pdfIn PDF document text
    • https://daismene.it/file/pifarolila.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100d33708eef---sobiwikudatatebalufepida.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/65242354444.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/ce5abbab5c8a1e524b6e59c2e93bc940/kilojan.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/vuporel.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/90264743402.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a52759dbbb---85678860131.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/94069566714.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/30350000664.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bbb3e415d8964eead58366ee0b019dfd/66150936957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=brief+history+of+mozambique+pdfPDF 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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 11228 bytes
SHA-256: 3ddaebba52f18be98692aec1ea70dc7764c1eb39303b2e5b1c29e5fd91e98ee9
font_01_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 18324 bytes
SHA-256: ad83ecf7d9d61a6cd6104e99a62829abb9b337c26f37d7b27450aea6001acc2f
font_02_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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