Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea740d48985273e…

MALICIOUS

PDF

90.9 KB Created: 2021-07-24 17:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e65b62a691c1fc065af81777ea18cebb SHA-1: efa5bb4f3570d2723a9208d6eacaf9614406631c SHA-256: 4ea740d48985273ec08edaf80d53d8889fa6fc07fa29d808b608d1eebed9255a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed for SEO manipulation or to host phishing content. The presence of external URIs and the overall structure strongly suggest it's part of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1f21f5ef44299e3cc82f2a97ab3c3d2c/41970378456.pdf In PDF document text
    • http://www.polni.si/Images/files/89987925960.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/sorab.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f139300b18---23859283516.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c496a72e5e5eff80ceee0a1c60e55154/wopodajojamagiwixonemumi.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/xadudavev.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/5f67ad815ffec2c14c4103fead3fd0dc/52582907965.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/29516500386.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a143145be10---juzefugi.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/manaw.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/2624a54185a962c73d0bc23572cfe7fa/kafewelotewuwinimogenujiv.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/sorepi.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/bibizibawikito.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607720b845169---wedesugosutevevojo.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/142ea7d4f529d20d1d1fb79ba1be157b/27639865053.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/7965069987.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/jgmrg56re98kn75hputrs7ldi8/83788538732.pdfIn PDF document text
    • https://sanidom.pl/img/file/60621218575.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2042f52a35---29964186283.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/l55tva2u92kt1joeakds546ro0/bokanoluzis.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/929fcbrpjhg6104dpmio53o6eu/puvobobojuzelepigilawasuk.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/fudenot.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/25934878556.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210717141018.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/jawuvaroweluranevekukuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dungeons+and+dragons+5th+edition+monster+manual+pdf+downloadPDF 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_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 11264 bytes
SHA-256: ee55bab8adbc892300e52d5443ebc240faf07bd7a49689bf9b70cb2cea5a0e06
font_02_sfnt_off00012a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 18380 bytes
SHA-256: 94d02b843cc15e632ba8d38887875963e4ba4220272874b37b803e82b42a4bb4

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