Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0c6c78549005ab…

MALICIOUS

PDF

79.3 KB Created: 2021-09-12 10:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ae96320ae71ad18fba649f40dddfa6a SHA-1: 7266907bea684db1cedbe60a0d212026658622c0 SHA-256: bb0c6c78549005ab3263ce52093b77e39c098cfed2da122fbfa4093f711cff44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1a8885489---leposudolovikerofugon.pdf In PDF document text
    • https://mamap.in/ci/userfiles/files/59868453308.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/kujevoxuvebovuxadawumagoj.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1852c7ce6bcb699af280e1e249b3b4df/65930865869.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1d6366f30---39656433164.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/tirumaki.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/sebamasotox.pdfIn PDF document text
    • https://proxus.nl/file/deduvej.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/36218417830.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/21895480102.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/90157597016.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/13005743107.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/zakojezaluxotaromexizura.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210902_1AB604516CAB8428.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135178151993---66946828829.pdfIn PDF document text
    • http://mweb.cz/images/file/86204441161.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/wumiferaduxesemokijupiwut.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/gakoxurotobakemibat.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/pigiweze.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/zadorujotixenan.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/71229742363.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c4b006557---jipasezeru.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361d6ef24d5---92505350294.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3519456090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bajirao+mastani+telugu+full+movie+movierulzPDF 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_off0000ce1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1B 10964 bytes
SHA-256: a193fed4151f1747012534b2280f513ba371301b74bce5a4898ab7e45825535d
font_01_sfnt_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 18388 bytes
SHA-256: 9f1b7ef081dc61a45fb561bfa50aae2831e463c9ce3773d502449e0c35f4b295

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