Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab985b4cd25dc38…

MALICIOUS

PDF

88.3 KB Created: 2021-08-11 16:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f580ff926113d71ab58e55c208bd8e9a SHA-1: 2272ecf24539dc3fba14e22b313df6d1cfc2830b SHA-256: bab985b4cd25dc38d73cdff18595800d079553fdb58aae14f15d10729189da63
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The presence of a 'download button' lure and instructions for a password-protected archive strongly suggest the document is designed to trick the user into downloading and opening a malicious payload. Multiple URLs hosted on compromised or disposable domains were extracted, likely serving as distribution points for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=how+to+reset+h.264+dvr PDF link annotation
    • http://kowel.com/ckfinder/userfiles/files/1623301217.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160864d3dd680e---sedibisupoluveda.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/kiwer.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/76247265693.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16080e9fd79b9e---36973669988.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/xapedikakamabimopewi.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/59237319987.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/kotugikomatulimutupakis.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021071222310152.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/44705576044.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210802164254_1xr65b.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c965bd79d75---17581668560.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/27ff6948a2feb5c0b1e9e5e83d234dc0/48631973063.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01d5ed9543---rabuxodug.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/m5sr22lfc7sotpqq0jnvhdqgs1/gerokodum.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/zepuzabetiponukali.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/pixijimesimivifika.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/63668419117.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/ponedupozotakamup.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610573d83963c---fubizokenajeta.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/85910747205.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/lipotuzedonadufipovumesu.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_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 16800 bytes
SHA-256: 228bf97bd86c4f58538f257041027c11a4813b438e0801dee413d5656e8656fd
font_01_sfnt_off000122c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADB 10516 bytes
SHA-256: 572c35cfbadcfb237dfcaf7821f4150d78edc2fc599057b0c1d3a4806586e290

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