Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198444b7dca5d09…

MALICIOUS

PDF

92.9 KB Created: 2021-08-14 18:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5630331ca51d7fdd459836715e5f1cd3 SHA-1: 96bb581d8163a22c54923059f3f2c774ec71f830 SHA-256: 3198444b7dca5d090bf1dd0c2bd0e84fba8347e55a4fcb9357646721c63bc84a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://archism.ru/uplcv?utm_term=convert+pdf+to+excel+using+adobe+acrobat+x+pro PDF link annotation
    • http://tai-yang.tw/taiyang/upload/file/989091907.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/sedew.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/188b9210ab009f08bbe8a88da176a1cd/48134949417.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/8f3cb626fdb1702b93797dd5fe4d20b9/12478354261.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/bixudive.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad5bd74b159caad648fc851414561a96/zabogexanipegejoguka.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941e932a7c6---27142836286.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/tabojosolejuguwidirogo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a368f49106---jisazasamifataduxoxe.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/dipuxametivoguzasimetu.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/5f95494d300d9a4d64e044b0ea291dab/32965259311.pdfIn PDF document text
    • https://murten-hotels.ch/userfiles/files/92492381455.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/33922373310.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/abe407cdb1f088bf99646de9da1de415/57731399184.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/96400833532.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f89bc97cbbf---38949617135.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7738806db6e19f6076bf3d0ed7f38e66/dupetu.pdfIn PDF document text
    • http://garderoba.sk/images/_file/jodepinavuvowijupiduja.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/nupogowovugibogerixaf.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/xeturewokegulosoradato.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/4832813370.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d828185d49---vixoxesoko.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/90124940556.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_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 11232 bytes
SHA-256: a3f2aae4dda1e4372e04fdfe69f601c0100ee57d6902f2522470836bc1f8feff
font_01_sfnt_off00011fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD9 17304 bytes
SHA-256: 753076e95712aee5ae944efb160e595aeaf2f645d13b243457ff36c2e1aa1648
font_02_sfnt_off00014cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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