Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c47dfd003e7d49…

MALICIOUS

PDF

93.9 KB Created: 2021-07-14 01:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6f579d37620f69688a30356341aa24ae SHA-1: 68d753748ab23cfc5766e5de91df990600628f74 SHA-256: c1c47dfd003e7d49db3275ef6f6b50af25d69a46b73744f8ee4daedb1e481ccf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://acpiindia.com/userfiles/file/kojanijuku.pdf In PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16086550f4f9c4---30749258323.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/3813f8cd4baeed3e03698e140346569e/visiwaluwagugapupigine.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/iibepbl41jja4v30ncrttngrm1/14557659874.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/75792557245.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/04ccfca9c11bd18de2c24ada35b4093f/gebijeninep.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/gekefizulanen.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18f4ebc0e0---vovigapurovawuju.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/metalepuludurepuz.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/jukipewisu.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/c58e53263761c1b8c14c09e37ed30625/muliwik.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/jorisenos.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c92cd92118---16574236203.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/53478139150.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/52e409341c74ee81f1745642b0b7bf05/wumapolefaleremu.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d23c5084c---widudunewuxaze.pdfIn PDF document text
    • http://firegallery.ru/img/upload/dorijerunitopogivo.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/554bfefffd47d4be3a531991131426a8/87701684362.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///tabikotumujoguwebunupoji.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/xawiseloded.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/qj4d74gn29obto8gvqm7b3g968/gijopomakupelafo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2f59573e6249f19ffbd393dbf50fa0ce/ganek.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/93963523759.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/21470fde867c2395718b5f6d9c574a03/pepotavewamikowalofun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sexy+scary+moviesPDF 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_off00010bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 10500 bytes
SHA-256: 0238c54eb66279d8da97b6346cc097afac46daa6c3d472765a03b97a1d021512
font_02_sfnt_off00013bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFE 17736 bytes
SHA-256: 2a68c3f393e04ffef4a78b4a04ce47c560000371fa7b2c171968a5b1b0766f9b