Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff35c9519c35c65…

MALICIOUS

PDF

73.2 KB Created: 2021-09-07 07:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee4b7aca87c9a2e42b939d6e6dac606a SHA-1: 7861d82a182ff5da5b865c73c6272ae4623ce5c1 SHA-256: 6ff35c9519c35c6554281d1683c66845decbd2b4db928b70fba8b39d1c5f466a
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple URLs hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f1be3f9f9da---42691132407.pdf In PDF document text
    • https://cometsecurity.in/admin/userfiles/file/mojosozalegimeripovumab.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/jelogaxoju.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a434e914d83---zugufufebekuzolomemusag.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/6cb7d316451e4acfeef0f463560bc275/vusumiloz.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c92e9dd73c1aee0b0d9503b837e51178/77428047866.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/bawilevomaxazifefobilozun.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/matagigi.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611dc6beb2d87---89466838700.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/19004581675.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/664291674.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/gizasuruxunun.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/79534594232.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/41541546563.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/31512190815.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/1e06sa36d3odi80ik5pc9m40bs/wegam.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/35085016163.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/dazasezamiberix.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/widagibarexarekop.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/4pr2nju9u65ri52jmghhvqjdts/jekedewuposafo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160beb917b6869---wokebagubiwobokojida.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/ponezeba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=science+investigatory+project+pdf+examplesPDF 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_off0000bb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB12 16072 bytes
SHA-256: fefccb4c346a151fed4f5d02e652e5f91ad3876786cc0226b15d1be303bb12ca
font_01_sfnt_off0000e47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 11452 bytes
SHA-256: 3dc3c4b2a03ea40972623038fe847c407fceeafb887fc3ea1c3cdbe1be21de83

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