Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41dea201bd68070…

MALICIOUS

PDF

74.0 KB Created: 2021-09-05 17:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: defaa6128352b2c600578e8adb8a22bd SHA-1: 20b893f6f93b8521020a1a684eb5f1cc725cdf43 SHA-256: d41dea201bd680700d1189f26322bd5ab6853ab08a8851305dee239b830a7b25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful content, likely disguised as a Jaguar owners manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://pcccphucvinh.com/upload/files/15165013652.pdf In PDF document text
    • http://championshipsportsrings.com/clients/23492/File/95975008832.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/89001811073.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bded3a4e9ca---91351446496.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/78248528331.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/61953497755.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/37282281121.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/zawaferuviraxika.pdfIn PDF document text
    • http://www.phuongdonggolf.vn/app/webroot/uploads/files/5102588396.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/64923855047.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-06-25-05-03-22-PAeZCOFa.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/fuwedabanepunaxosofafik.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/68dd9cef39e7b49ebbef4a43da06f3b7/56251388392.pdfIn PDF document text
    • https://aramlasmerok.hu/uploads/file/24731448986.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/659bad77a1085ce722805f10734c59a9/tedigobalepefedalez.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/a428db2ec5cc40ee4bdca324e969ec74/vewidetej.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/luguxadugowilexupovat.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/zedobapidepodaraxumoken.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/1c2e2af62871338e6991a6f42f3e6809/migevufabuwawa.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/midiboxexefagolom.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e818dce7fc9---69047234772.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092042f79728---32079405709.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74950b519---bunefidarapamozomagoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=jaguar+owners+manuals+onlinePDF 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_off0000bdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF1 10528 bytes
SHA-256: dac472c4bac8e7ffd20a4ef50a68703ca5dbefbc5248ab8f698f358f290c8da2
font_01_sfnt_off0000d5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 17296 bytes
SHA-256: ba2fafef4bc8138d0c86c6086ffa3f5607475a6d3c1b27da7f6000243424e8ae

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