Malicious PDF — malware analysis report

Static analysis result for SHA-256 601db56857630fe1…

MALICIOUS

PDF

85.2 KB Created: 2021-08-19 13:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9c3503ba02ab7a9db6cfdc810b5c49b0 SHA-1: 9e733f03b378a0c2166d9544a2381306e3bf4a74 SHA-256: 601db56857630fe1a863120d95c58843e42108c25d8115b692ade64ee644017d
164 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • 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 http://www.phuongdonggolf.vn/app/webroot/uploads/files/11033137496.pdf In PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/878b1b458efed86e71ee655b8e9827a7/sewobukakugenabake.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/95628463261.pdfIn PDF document text
    • http://ebus.cn/up_file/file/nodesodakudufivu.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/22841837856.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/dpcp8p01npe3terl7gj8ts8gu4/buxoxigokubolukovenesana.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/5804265698.pdfIn PDF document text
    • http://yilip.net/userData/board/file/66765780471.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/batemapijoxomoferelijibev.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/8h25r1r4mr708aiepu4qg5lnab/ladusupu.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/80446193271.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787eafd3d83---puzoduwosasawikebe.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/95109377091.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b5e61c18e---lufamilazotewulineduza.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/bovojakumij.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/88202647824.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/4hhr47qr0dg13rru27rrc4t32r/74720387875.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/xaxamemiratesawidoved.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/vcpraprjgiiv1latjb1qo7kknn/wopusulibasujupin.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/fe225b9e85a269fd93a9c186e620d428/92383274177.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072864477e23---pubajefoxulibodudibo.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b540d8ffaa426746f38a15bd260a306b/bomopovebarevuzatilikig.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/vasanibuzewizikirakidetoz.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210601062959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=a+aa+2+telugu+movie+download+720pPDF 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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 10992 bytes
SHA-256: acfb182bd627b90eb055b350aed3837e2e1d59001d8ed3745a742f1bb8bcaba9
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 16748 bytes
SHA-256: 9a89a6a2beff283d5c53927ef61aaaf796ff4f90d57757e79a2f34599c259e07