Malicious PDF — malware analysis report

Static analysis result for SHA-256 4969ae2a2aa93a4d…

MALICIOUS

PDF

76.0 KB Created: 2021-07-04 08:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0d7b14bff0d155f2d1b6fb996184a80d SHA-1: 776ff41116553973eec11f8942747c0b9b4ebf45 SHA-256: 4969ae2a2aa93a4d3a7e6f7a6083ed2a469bf9a28927697f056166403440abd0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external sites, some of which are hosting other PDF files, indicating a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • 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 https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/f2b1e5dd5a9c9454a5dae417cb7e3468/51607925976.pdf In PDF document text
    • https://dodatnagarancija.com/userfiles/file/18211293489.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210524203203.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a1cad9ed9e24f8f1d06c9a9d49f2d778/28781692178.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f06dc62d589624c573ec7ebe574f91d8/laxamikizanutezazajud.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/i065r2j7qge4qe1vu44snuuqu0/maponorowubizesupivekoma.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/jefatosev.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/momap.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/143268e1b45af8c3305447f25cb107f7/34339802543.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/212dd50ea7b14ef6c385da0c701bd0dd/75142775090.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/344greud3hpuk9l0m6k4q7r471/67955776288.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/27977535130.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b32ff448f0---wogozibowalubijezarajex.pdfIn PDF document text
    • http://chongros.com/userData/board/file/77332193914.pdfIn PDF document text
    • http://clumba-indoor.ru/files/files/dovebarukaz.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608335a1954ee---1954479390.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/69bba1bbe727176a53f0d9f2ce013c95/gapepenelejolatif.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071aea1c3f0a---65113006095.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/46373840542.pdfIn PDF document text
    • http://siembra.me/uploads/files/97402938046.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d26ba233c9681baf0d37cc3317db0945/kudezasovakudamawu.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/54173e5856767c960d8e59d941020a56/10974290227.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/5645057032.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/fulekujojuxuzote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=naplan+past+papers+2017+year+5PDF 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_off0000c59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 16400 bytes
SHA-256: d49fe18f7730705cb5f8d84102a6bb8cea981f4495d4e82679fcfc764e7857cf
font_02_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 10600 bytes
SHA-256: cc6ec7625cb549d9402231225155a2e9e7d5f14f30efee79192c54564974c05e