Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed2c5bcd8f4d5f6…

MALICIOUS

PDF

75.8 KB Created: 2021-07-10 04:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7dc6156ff7c00810eefb1a8f9a12f354 SHA-1: 8ef75abfa2aa0a499dc5ec2abb8e5b11fcf29235 SHA-256: 3ed2c5bcd8f4d5f6bbe2c678c384fcfebde335b1efe5c115d8c18eb76bd87b47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=here+i+am+to+worship+michael+w+smith
    • https://247hvac.ca/fabulous1/uploads/files/viwemu.pdf
    • http://aite-materials.com/upfiles/file/dolekebenazizaxakuda.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/fupebokojoxa.pdf
    • http://villa-carlshorst.de/sites/default/files/file/92089793840.pdf
    • https://peintures-descours.fr/fichier/files/gokumuveduligabat.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/64d1f2a801931d192b1d75b94048edea/wakogifojudagigibul.pdf
    • https://farmacieitaliane.com/documenti/file/62112895600.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5914cb104---muwedaven.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/tsjbo504q5t061tkvrpp6b96qb/pemubotenikujaxawum.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rkku5g7ta4pmkdtods084ufc5j/1154686134.pdf
    • http://rebizplus.com/userfiles/file/periridobuz.pdf
    • http://aranykoronakft.hu/userfiles/file/fuxigurojivuwofiravorirul.pdf
    • http://akinmedical.com/uploads/file/jigefowivuk.pdf
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/14532021942.pdf
    • https://workinhotel.com/upload/fckfile/14114107211.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/31s3mvsmqlbjcjr8r7droilmdi/19286273264.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b704fd488e4b7f230e9ef657317120cf/21128742969.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/a21a1d2ad5e5aab6245e12df83e0f0ca/40428194793.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r7fguq2pjh7if1b958tf3b9a1h/30453733703.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6f4c36eb2241f2054838aa9bb4d711a0/gakog.pdf
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/wodivebeleruxojiluvixusus.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/f02f5cec5adfac2d11157f6d62fde1aa/zinamiwaguluwivixub.pdf
    • http://kolaykanal.com/userfiles/files/827436142.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0a4c66d0f---61236242386.pdf
    • https://computerzone.pk/file/40726265716.pdf
    • http://cafehinglung.com/uploads/files/15542370567.pdf
    • 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_off0000c463.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC463 16792 bytes
font_01_sfnt_off0000dc7a.bin
b9016a7d8b4c11b0d3b9a78732f994e0330f72157d7ac855c14e4906977ca5b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7A 10612 bytes
font_02_sfnt_off0000f4c8.bin
86fb6bbec63e787c64472f60235090aefebb59297b42d68d56486f79a60f4122
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 17712 bytes