Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d6c9c87d26390e…

MALICIOUS

PDF

138.3 KB Created: 2021-07-20 20:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 96965ee69b40b3cef2a9b7986c4579fb SHA-1: 3f76be854ae00d0dff3e62a4db9968c43c11f455 SHA-256: e7d6c9c87d26390e85fad203bcc2da4a723732cfeb8e02c28a14bd98a864d098
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to domains flagged as compromised CMS uploads or disposable hosting, indicating a link farm designed to lure victims. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://ilturismoinitalia.it/userfiles/files/nowuwirubenipozudurut.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb1ca1731a---93713496780.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1f37de3f4ba822890cff32ad9ac2db75/sujexufun.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/koduwedi.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/vidopagoso.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c96b3259e---tokajuvalujoputupibaniluv.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/giwuwamimamolorizebazi.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/91510852044.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/7a73fd9219ea6f61b12336d818cc9467/10358515836.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/cd36bb028fdee8c35dcd8169531dd858/kafakobenefizojew.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c3ea55df952c8fe431ebc504d686e148/64699684574.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fb49lidpr693750ne4g4bk0bs7/puganodukexisikipo.pdfIn PDF document text
    • https://medtek.vn/storage/file/51836901552.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee74ebe46---65804079997.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/kimegejobi.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tebetirujitamovasuforulov.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edacb920fc---38745542846.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f36fcec4c---83628659257.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b46242e4a5f---93962124367.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/04e962da9b901f626ab7dbd93e81ae3c/xekimaref.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ll4omsugmtgjo0pije22vmcn14/66219093697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=porgy+and+bess+at+the+metPDF 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_off0001bd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD99 17676 bytes
SHA-256: 7df370ea27815db66d97a59a43776812301aa3d0564a48a77cb7f1fcb0d9bce7
font_01_sfnt_off0001eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB1B 10812 bytes
SHA-256: d531be3cecec2754164f02c14475bc825e1cddb0efb940a8b964ae42d0451f30
font_02_sfnt_off000203ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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