Malicious PDF — malware analysis report

Static analysis result for SHA-256 538c67e24bb842cc…

MALICIOUS

PDF

80.6 KB Created: 2021-09-15 06:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a87359cd6ffdc0b6f02f65d8c406ada5 SHA-1: 68a69aaf39b4dced8f6cc46572a184d030aa6160 SHA-256: 538c67e24bb842cc9a4479f0203959372669dbea8403b03ae7ad034d6f099086
156 Risk Score

Malware Insights

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

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 distribute malicious content or phish users. The presence of these links and the overall detection indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://laborke.ru/uplcv?utm_term=how+do+you+make+the+color+violet PDF link annotation
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdd8b47279---7653674162.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/99634501973.pdfIn PDF document text
    • http://amkchem.com/upload/files/wivubavetumifaj.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/nerowokoratisobope.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/bupabopeloxadobe.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/foviraxowifede.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/solenob.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/dujilazibigebajimijojuz.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/68731002612.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/25085995690.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/sisagefaw.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/kunipinowimulusakap.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138deae812---85788270385.pdfIn PDF document text
    • http://inistor.com/ufiles/files/zomufalaresoda.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333bb6891ce---40026118894.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614123c3ada49---81730306465.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16132039471a3b---zidukuritesidikasuduvebur.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/jegeli.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/degevisuzoxomogejemazuxe.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/gbohs5p714eqakoj44b0loe0dm/30366715216.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/gigefotitomozivet.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/20987329042.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12535960096.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/35415091657.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/kuxirexopufebani.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_off0000d89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89F 10812 bytes
SHA-256: 49854dace2718a915d0b9e469ff89b81d4c69b258895f088876ab94d0367da1a
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 16616 bytes
SHA-256: 44256db0e91e059c99da6cdf6732f4d1cb47f696ec5e9c9852db6051fdc86c23
font_02_sfnt_off00011cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.