Malicious PDF — malware analysis report

Static analysis result for SHA-256 86eeb3120d5c1b66…

MALICIOUS

PDF

89.9 KB Created: 2021-09-17 17:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a981fbae899003513669f394aaf1b162 SHA-1: 8a18944352fb5c5eeb2f0df1ea721d17168459e5 SHA-256: 86eeb3120d5c1b665d61658e8951c9c52206b74c01e3fbb899dff6eccf7fc5b6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many hosted on compromised WordPress sites, designed to appear as download locations. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2cd891446---sigisilodazavogoji.pdf In PDF document text
    • http://lahma.pl/_u/userfiles/file/xaxarimewovapan.pdfIn PDF document text
    • https://soechi.id/userfiles/file/58063759588.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rovexegur.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/49563038697.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/tofudogoli.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/zajigezidesadixavesoluj.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb6bc9e529---verijafunitef.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/36877919547.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/guluvawetujuk.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/xomosanabe.pdfIn PDF document text
    • http://maksimetall.ru/files/12365921958.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xodelidavorimanox.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/jijedomelelaji.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/omhctab7kt7a94vf2dnkc2ik05/78714745561.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/tigovubekuwumep.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/65594686647.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/89757103489.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b0385bdb4---gobifewenuropugu.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/78698076968.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff896015a4---fadaxedoboj.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/genevi.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/nepaxopebokuligoxederi.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/14483531070.pdfIn PDF document text
    • http://baoveantam.org/upload/files/xuwakesolezebefod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=full+movie+the+conjuring+the+devil+made+me+do+itPDF 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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 20352 bytes
SHA-256: 834c015510ecbfb6d8e077724efc3c73fcd997ed4a4e6ec010956898978abaad
font_01_sfnt_off00012817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12817 10920 bytes
SHA-256: 41ae4d29f7b829c7232dc039367a7ddc2033c41c85b62783b8e7b88b84e26073
font_02_sfnt_off000140eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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