Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bfef804f968173…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 02:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b34ebbb69b3ffe37bc36b4f66fff2d94 SHA-1: 45193bf86c73251c8331290b80e0bc23b134af34 SHA-256: e3bfef804f968173c4f616dfa4865c12a9d7c726b763005777fe0c3d675864a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious, along with heuristics flagging it as a link farm and compromised CMS upload, strongly suggests a phishing or malware distribution attempt. Although no scripts were directly extracted, the nature of the URLs and the overall structure point towards an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=ps+now+android+app PDF link annotation
    • http://consade.com/userfiles/file/91391143023.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/6109423471.pdfIn PDF document text
    • http://katachizu.com/img/news/files/kikadokitonuvi.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/mujovagidomililunaga.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/438895d40683c7454c827db3d41fa06f/demupesuwaju.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161444056c07f6---20782493170.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/16c612c3d8cdb4caed9521e35c3f4308/ridinibozipiwiva.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/64707651832.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/60399502434.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/79739786249.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/18827546635.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/kipiwukutafusebebe.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/dexonotowixamaxi.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/ribujatuka.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/31169219652.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/gidix.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/lizaneveteg.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/jofajuradavaluvame.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/6823911091.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/woxulojunadupasez.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/ratodiwisuxabunufovomaza.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a2ab7974---piredozokuk.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/gasukufetovexude.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/92894391836.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_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 10196 bytes
SHA-256: 3a2496e83ee6538d5b5d7adf9a73d7787445e294c578495fe57bb44a3280074c
font_01_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 18056 bytes
SHA-256: 95665488a964cbfc65e5b8ca39877fe1789c65587e35fac82059bc5b6a0295c9

Open this report in the interactive analyzer, or submit your own file for analysis.