Malicious PDF — malware analysis report

Static analysis result for SHA-256 015ed6e492bcaefb…

MALICIOUS

PDF

83.8 KB Created: 2021-09-22 22:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2957135a61d57aeb1a96d27c5cf73b48 SHA-1: 90450ded245f88ef974cb295e5ec6f5b8e5a61d8 SHA-256: 015ed6e492bcaefbc476d68b10a62fe964512fc917d8be877af3555939e9071a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://viral-list-monster.com/ckfinder/userfiles/publics/files/gidomekisavigined.pdf In PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/44713586857.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/73219218439.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/gusisaveguporiwepabawovov.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/29o25toc6ctjiqkvqto039948p/84403910797.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/milubasikufilasulefuxi.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/91128333941.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/mulixipe.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/zevowowotu.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/16246963966.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/17541426959.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/62286541051.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/jewiliwom.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a5a6a7ab329465e139060544ac2471f1/46219505792.pdfIn PDF document text
    • http://shamayachts.com/upload/file/48191115942.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210917_1D3B60AB30F8B96F.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/31155499262.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/695904995.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/69972087352.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/xugivotefukut.pdfIn PDF document text
    • http://activesites.atiks.org/files/70794625179.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161451fb5dfe0b---seputigajigane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=android+phone+keeps+closing+appsPDF 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_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 10768 bytes
SHA-256: cc50d55fc7890be34320ef8661a35ec38bc91ed87049f6064022a8786dbbc2dc
font_02_sfnt_off00011296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 18244 bytes
SHA-256: 0abcb1cd4480309bdba2f2bb6d0f170bba6231bc8e7ed468b52a6757a40ec53f