Malicious PDF — malware analysis report

Static analysis result for SHA-256 182f803b07829549…

MALICIOUS

PDF

83.8 KB Created: 2021-09-15 19:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd010fcf85d34537f739ac41e6a19f19 SHA-1: 0f25e5de96d4fe9806533a58e199ff393c5ab16f SHA-256: 182f803b07829549c53cc997c8526f9e36923afeb9c1102634ba1fea2a1ab7a7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple domains, some of which appear to be compromised WordPress sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=how+to+unlock+phone+with+broken+screen PDF link annotation
    • http://csaladiegyteruautok.hu/userfiles/files/87232949314.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/57331738677.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/rarorozaweno.pdfIn PDF document text
    • http://apismorava.eu/docs/vuwixiwugugupadilibuwa.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31910d22d---begetej.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/japukojuzejozexuna.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/jojevugonewiwubix.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/1735668310.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/pidizifunefiwe.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26f710b89---ruwikenumaduwuzabikaf.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/guzeramuxajom.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/kunafoj.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/76367562101.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/230901821.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/jopemev.pdfIn PDF document text
    • http://logicamail.it/draft/media/posivede.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b865b32293---wapetulekezet.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///4408510689.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210914_112600.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8o42tlsdblgt0c4gg6qkgpu3k2/12649065399.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65051198512.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/vigedusitibidut.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/d3ab058b11d86c6f056761d8bee5c107/vemakoxezij.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/rulevok.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/feninezadilizanexisa.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_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 18012 bytes
SHA-256: b3fe26b1e1d2b9e2601f6f48183d8a7edd3ca11fe1d4526da39dd3b0f1cb755d
font_01_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 10720 bytes
SHA-256: 5b7966a9ba3fdc041284e31b9d5728049a1c54669c81f998b499e77d27fa99e5
font_02_sfnt_off00012963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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