Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de4bb01d1d36393…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 03:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e74789f7d0af7468734f14f75910e383 SHA-1: 46b5f512557e79adc9bc9982cc15e932f73affe7 SHA-256: 6de4bb01d1d363936b75c36fe06ca695797ecdec03d8ec9d208023a354b5627a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which appear to be hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure itself is designed to lure users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://meechoktoolmart.com/user_img/files/52514927125.pdf
    • http://staractivecollection.com/resimler/site/files/79424301345.pdf
    • http://klassn.com/ckfinder/userfiles/files/resijukovagused.pdf
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/4609dad02b369369106cb5cf20448c58/84295886733.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/xerotum.pdf
    • http://younewstoday.com/task/userimages/file/mufupegezufisawolo.pdf
    • https://aimhc.com/userfiles/file/32271773527.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/897cdb7c09dd20f6bf97783ae6a3a316/80688967411.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b2acf9b1255---62938873225.pdf
    • http://szyuangang.com/UserFiles/file///tabikotumujoguwebunupoji.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075387e5a393---44163923026.pdf
    • https://uppersanduskyrotary.com/cms/files/File/73862382782.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608270565323b---rutiwetuj.pdf
    • http://charontrade.hu/data/file/renabija.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f9791be91878c9d5e9089b630f393dbb/junaziraxum.pdf
    • http://stalmost.pl/userfiles/file/magekofujuxezilotajasivu.pdf
    • http://greenplanetnepal.com/userfiles/file/logovifesazewovorowusomix.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086d673a7704---93404216237.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dde2ad5943---8040114615.pdf
    • http://pileshoppen.dk/userfiles/file/5424060687.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/89a2623bb03b5e29cb40afd311a23664/latotonejozobumasoreb.pdf
    • http://haohanlegend.com/Uploadfiles/files/bigevikusogavuvuwovipole.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=rule+of+divisibility+by+9
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 16792 bytes
font_01_sfnt_off000102b7.bin
14e7697210e57a43e3c3489de936cc6a5f9f747a131b1b48979c64cc2dde8c96
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 10616 bytes
font_02_sfnt_off00011b2e.bin
dbb9f2a60be225b4668084df10e19df14f5f56a7845a7f1e222a16b4f8767aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 19100 bytes