Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d39d2a9486f1f3e…

MALICIOUS

PDF

80.2 KB Created: 2021-09-08 01:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a2b0d9211c34afb3163f7ba278218a43 SHA-1: 1c1cdf4c5b1463eab88635e88804092704c684f1 SHA-256: 5d39d2a9486f1f3ebfc30a9bc6874f3ac1ec78bb57ea413150bbfcd0385908d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute phishing content or malware. The presence of these links indicates an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=grief+is+a+thing+with+feathers+pdf PDF link annotation
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1a5f79577---74516973446.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20901c48d---befofiratokoselanafulu.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608914e58d0d9---daxapa.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/61398527995.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/1c2af194cb187064f4d95f59832b7353/14244530507.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/refededonumonibegat.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/bidebine.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b249b86a199---90033543556.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbbb6dbf4c---31945931810.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7bc993677---xipapufazido.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3cc68aa33aa6cefcb057bd9011d7bd7/pikotubisuvabikaladisose.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094737f6c887---potetevawitewimuforubuvu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e3350363---govari.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/28123616126.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160710e4b2124d---95055482578.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/e3ivq6pj3r1pfh5mp5qudbbqt3/66751004525.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/1135f1fe58920175cfa6e4e68446148b/bukobuni.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/xowibe.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/791842815.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/taleroduxewelir.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/topadezimigi.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/delogaruxavubiwiguz.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609188868c3b0---85511835204.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/kofon.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_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 10736 bytes
SHA-256: 8eee496dc259cefce97f811b2205e421f01c55933c36dceff6e5fbb536abba69
font_02_sfnt_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 18176 bytes
SHA-256: 3fa521997fa4413d3339d2255ff1cc27a16869b3534118065074ec5244df9cd9

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