Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d003d8d9c49304a…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 23:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 712c81a9828166baaeafe7c0587c056d SHA-1: 2d83627f22b9e29fd712841503dd402f3a3721d4 SHA-256: 6d003d8d9c49304a90cdecc542a690ee31dd7da9f40fd718f2ce5097589deee1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within a link farm designed to redirect users to potentially malicious sites. The presence of 'utm_term=generator+robux+hack' in one URL strongly suggests a lure for scams or phishing. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely serving as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://wastran.ru/uplcv?utm_term=generator+robux+hack PDF link annotation
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/susifome.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/90301837645.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/14238668819.pdfIn PDF document text
    • http://normel.org/files/upload/file/wejofifuwo.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/65509862278.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/jalinez.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614e93fc7ed34---5183395979.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/dafedefojove.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/loxek.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3a453f65f---95801911229.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/3491789965.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/16791492248.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109011219252815.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161329cf147b41---15250614657.pdfIn PDF document text
    • https://bientannamhuy.com/wp-content/uploads/files/sogav.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/95867554297.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a3cec974d9---77991412010.pdfIn PDF document text
    • https://riwg.in/userfiles/file/29216832544.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/68391796967.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/xamakadatopixavakaj.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/28046698432.pdfIn PDF document text
    • 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_off0000acfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFC 16268 bytes
SHA-256: c11ba71ed32b9da7f220948469cef0a6429a8a8af52412e92db00b1d8754db01
font_01_sfnt_off0000d627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 10492 bytes
SHA-256: 30807c8a459adb68d27ead4b3053f5950a2a131b8c95f33aba52b6e32926ac24
font_02_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1