Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcd004ee4b1d98a…

MALICIOUS

PDF

74.2 KB Created: 2021-09-26 06:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89bde3df539fa20534197f8a15b2b68d SHA-1: 3c9a3bb638e35b0804fd7bb5ccb187d1a0765ce3 SHA-256: 9bcd004ee4b1d98a96f5c6e875da8f5f1d3feb3695ddf046a391b00a58469932
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://findmecakes.com/userfiles/files/46850325318.pdf In PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/pezagikam.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/lajetiwugoxebu.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e78cb4a512---1203842581.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/53703359287.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/83533695869.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/74000088147.pdfIn PDF document text
    • http://eva.am/files/9f9332b86c67b7c6.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443bdcc7ad4---10227325400.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e9440be8da50f95319fa85edffbdc851/95916486540.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/36237203057.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/74668647221.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/zexozimefawi.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/59814726801.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/58330056859.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210925025231_1786579783.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/kizemelasamaforajesip.pdfIn PDF document text
    • http://rideco.hu/upload/file/22040482946.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/84818545976.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/kimozesiridiwafutobevepi.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/29352138100.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/siwufinufaxazeme.pdfIn PDF document text
    • http://rafaelokazakov.com/file/8313875245.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/50060946675.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/xejobinagokujolevogoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=androids+best+music+playerPDF 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_off0000b985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB985 11008 bytes
SHA-256: d2555a33d890c82f17c3a68678b6c4dc541e43b37fa47c932951dac9fd1919ae
font_01_sfnt_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 18632 bytes
SHA-256: b9f59402019f548dcb0b06bf71ff66b36c599252bc8c248ca42f6729dcac73c0
font_02_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1