Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ffe6758702e104…

MALICIOUS

PDF

69.2 KB Created: 2021-09-10 05:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22bb0370277eed27aafcad61e299006b SHA-1: 304e0ee6adc39c97b571ef9937ceeeb25a2a8c6c SHA-256: 36ffe6758702e10469b58c246e09cc94f8bd8f8d2b4c5d24df4dd0dde58bca06
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studiobaliva.eu/userfiles/files/pelanesizewemuxab.pdf In PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378d22f3ee3---29503893055.pdfIn PDF document text
    • https://tele-video.ru/upload/files/32003055039.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/guxiwinagijelipax.pdfIn PDF document text
    • http://caythuocnam.org/images/files/20023991289.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/gaxijadenizeloxabosom.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/59727363083.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/cf645b0d60a9952e37b2a723b86240ec/tagal.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/9625524438.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613647610bccc---mufegizoxajegi.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/78368642203.pdfIn PDF document text
    • http://kisito.com/userfiles/file/lovijabuxamubepobune.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/xelolukim.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/78206712203.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/76061457289.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/nedefatuxenexalufidazi.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/39175590542.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/0mlf3ddhto5u5frj311h2hprtu/xifadiluwis.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/54375086240.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/vabukivakefetofuvabiga.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/53234073177.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/naxenoselese.pdfIn PDF document text
    • http://pololanna.com/user_img/files/manefudedetejinam.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/mejomakomiwi.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/ninozale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=minecraft+v1+16+210PDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/6849334192.pdfIn PDF document text
    • 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_off0000b279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB279 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 10516 bytes
SHA-256: 09f86b62c2c5b5d7c65efa6598f242e9734c0a07524842f77a43f57a1049ff95
font_02_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 14800 bytes
SHA-256: e599f0ad172b08aa34b9062db2334882e53779959a34d9d4e8845b15f0e7d619

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