Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb6aed7e1f63bb2…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 20:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8d0780929669ccf20d7f9a30862f17e8 SHA-1: 987dbf63c8359446aafaf72ef857db96cd85ad7e SHA-256: eeb6aed7e1f63bb2e246c37f093065bc87ec6f45f4f40a1b62e7e4bc6b84506a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories. The document body is unreadable, but the presence of numerous links to potentially compromised sites suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://prosquash.by/data/zatotokozoduriluk.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a49430b8b6326c6b5b1c923a7b8cabaf/48343802712.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d77fcb6cd2e---18438767920.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/1535014741.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cc346bfb9---bawuluxaja.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2753e4a1675a2c251cb311599d32d87d/wunaratomediduxuwugivid.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/lonatovoxasovexar.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01a2ec007b---kalezogaloza.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/70675651939.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d950113d1---21938567871.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/gimajiletijavok.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/14181177084.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6612267d09927cd3b14843ab2869f45d/samorawokapivodugajurixat.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/fonirijo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608777d61dbcf---56947381259.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/detubekefijosawivofoj.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121d2933f213---lijepolifil.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/kanafekixonokanabajolosow.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/20010358607.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/57804174091.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/6729498003.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa838101e5b---34311498009.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cd5109e4b431b22346348bc8184ec520/gatusewozusowibenufe.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a0790737a---vogesefo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=umbanda+n%C3%A3o+%C3%A9+macumba+baixar+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_off0000d80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80E 11108 bytes
SHA-256: 0552dffc06a9da81f0328336b9f490c1084f2205beac5beb341aaa301b67412c
font_01_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 20700 bytes
SHA-256: 7a6e56fa1fbd9ca718bc6bb7fc189128dfb6fe65e247536fb6a12eec1de15b40
font_02_sfnt_off00012511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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