Malicious PDF — malware analysis report

Static analysis result for SHA-256 982dd572e1ded733…

MALICIOUS

PDF

86.4 KB Created: 2021-08-22 00:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ba06441d8e13c70e0de0e6621db21ae SHA-1: d42cca39d5daf8d8d425402e967c738e80b59b8b SHA-256: 982dd572e1ded73300c029dea150eb8b0f6bd93c783a0365a68b17d55bcbac6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment, suggesting an attempt to obscure the true malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://ebslang.net/_UploadFile/Images/file/pabusodogajiga.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d3341d157---68713283086.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/54097829145.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210714124435.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/99527815957.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081d87b373e5---xivonufejavebawotakusi.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/upur65hrocfnqphkopn49alho4/47018889035.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ppuefb2jvpij6kud3d58u2le34/kekotavawiz.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/92270002910.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/nemifif.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95946bd7b6---lowawifax.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/mavogemajamibipexuw.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/352b9dc040de3dfd6c9034e2f345b8f1/63286560335.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099c5b48e81f---ruxifeguzedenevikizojawap.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3e35febf6e---45775017971.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160927187787c3---6287579650.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/deviguku.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/68544994004.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/konovefibulot.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/tidopamonite.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/84121287388.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c72f6c0bd3---napunerisagepaku.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e7446c25b479661ba1bedbddf60c8c57/jomigutur.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zerupezemovobin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+really+get+free+money+on+cash+appPDF 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_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 11024 bytes
SHA-256: 3b8bf0437b222a59eb842212fdae56c5f058ad2371a04472120b2e4593b5983a
font_01_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 17300 bytes
SHA-256: ead85542e7131b9cf46a74f2affa3fe05db5b09f46dc13c24871245f8dd6c0f0

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