Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7d26c568e3fd27…

MALICIOUS

PDF

86.7 KB Created: 2021-07-08 06:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0545036c4086906b15de4a8d8ff41789 SHA-1: 88dfd7c4daf03fd3cf7d4a36aeafa42fcb1a08f5 SHA-256: ee7d26c568e3fd2711bc61753eeb38b26e665056b2b2a5fc90f4e2e20ceac0ff
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://laborke.ru/uplcv?utm_term=a+female+poet PDF link annotation
    • http://energo-winstal.pl/userfiles/file/loripofoxowazatib.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/lizawaxotetopuvewabitakow.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/megojiguxemoxasuvivoga.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/eudkcnamptv1sn88i35j146625/rujedo.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/jedanabulonizasib.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/dununijadurusegudikujib.pdfIn PDF document text
    • http://willbramephotography.com/tegejareg.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ea95v7oj7m1h77ni16kap5h173/vewuliwe.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8ef5930bf---26480115730.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/wiximuwikezabevoborobinis.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a3869f17ae3---xanozavurut.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160825aa74a614---70735089684.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/viximetelagutijefara.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/63717992253.pdfIn PDF document text
    • http://cpils.com/userfiles/file/42418298847.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/85425230890.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/78832502785.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/085bf9f7f50c4f5b588dd2c3bde82b9d/vapurokiponigo.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0767cd6e12---nunotetefadadabebetiveruf.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/2624384492.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/e52f982ed37829957cb11a0b1f64cc3d/72695905528.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2b926be3a---29338063315.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a177f65f69---dazotab.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_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 17328 bytes
SHA-256: b9be1950edd1e3795504b7905d9af2165efd466ec1498101598d61a1100f4077
font_01_sfnt_off00011f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4D 10036 bytes
SHA-256: b5703fe39a6121a35813b75e2e5c341de59d6358c238075ccbe3e5b83d861ea8
font_02_sfnt_off000135af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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