Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9535501b0e272a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 15:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 24a9edd275faf0a0bedc14d8757a5f2d SHA-1: a61989e076fc5fbe58d3332e82b1c23d84bbc5f3 SHA-256: ed9535501b0e272abf1ff2fc9f5a74976f23f67665bb63540317a49990dce432
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=instagram+see+who+viewed PDF link annotation
    • https://network-italia.com/file/53517483502.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/bajinuzuso.pdfIn PDF document text
    • http://szpk.hu/_user/file/45902052577.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/xavijiretoxisi.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/71743018870.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b181dcbde---pifegavakexaliwulofojad.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/13888315915.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/78533198351.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/58925768025.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/6985127282.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/diwizonopudedafedeled.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/31484935711.pdfIn PDF document text
    • http://186086.com/upload/files/26901793579.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/nebupizudiso.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141bbf465571---zetowux.pdfIn PDF document text
    • https://membermimpi.com/contents/files/zinonepadidutevamas.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613524501a437---53266194252.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/52706522193.pdfIn PDF document text
    • http://shahgrp.com/uploads/4675939150.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/derog.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/28407594951.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/zujidiro.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_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 17724 bytes
SHA-256: 6547c25137d75617bd6c37fdac255fff2f1a584c51533b315079a74d4099d83e
font_01_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 10752 bytes
SHA-256: a6e047e8a044a7eb21cf394f482b5ec8d9cdd8175fd5bdc5bedbf33db28d94d5
font_02_sfnt_off00012761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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