Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfbd79ead620a3f…

MALICIOUS

PDF

69.8 KB Created: 2021-09-22 12:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6a4d66125f09debedfd4027a79afdba SHA-1: 0716afbe7dcfc5016b03f46c48215fb43011c312 SHA-256: 0bfbd79ead620a3fe1e12d6ceaa02337d1923902b6775e8ab2716f894ebe1aa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://traffictkt.com/viking1/uploads/files/42210013072.pdf In PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16137c313f20e3---92590161481.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/ludekujifa.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/zemop.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/98653897586.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/giwafesix.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/bagexemibibigivof.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161300e33cf091---14217475504.pdfIn PDF document text
    • http://kahasat.cz/data/file/97257742843.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/pebom.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/vodibewifazekenelowot.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/70465263714.pdfIn PDF document text
    • https://sanagustin.cl/files/ponepelujewebokusexarivun.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/42259628042.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161358539b6c1e---87281521251.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/61276806753.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/67ef30e19f7097d99a25ffd7e33ffc41/vekozitenegidalozaxutoz.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/mogagedivamiv.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/34304210482.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146a704757b7---93717318428.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1715011ea---rugigaluxutisidebezepun.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/86493761972.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/41415258932.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109022115423183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=comprehension+for+class+5+pdfPDF 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_off0000b4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEF 14344 bytes
SHA-256: 527bb8959edd214f7d4418121f2ade3983d99b229fb3da2f8d1ff1f982413e06
font_02_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 10952 bytes
SHA-256: 1d1e209de41b12a0798f374cc3ec2b48447bcbb0a0f8d92fcffb0a4f69e84cf2

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