Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeacce000967c8d…

MALICIOUS

PDF

93.1 KB Created: 2021-07-16 14:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2f8f409c0b41e4c4f7cfa13ed6ba8441 SHA-1: c40f7bf7f71a38ec57aac498e41bd1381536c900 SHA-256: daeacce000967c8d3b7ac018799d63ddc4ca4180532e549cdcdffac70200a00b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of numerous PDF links pointing to various subdomains and compromised CMS uploads reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://childconcern.in/trila/userfiles/file/burebagegaxeli.pdf In PDF document text
    • https://tkquiz.com/userfiles/file/jodazonefejutelag.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/asj937gv613gnmpi0cn1t679un/kekiminijokinal.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/n86tr229nr4hvn8snl70neito1/nimijiwutexututiwogonivap.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/531261264c220461899b2fe293ef9f5e/80171206666.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/ninuwawenezarajabalar.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701ebec205f---43141552346.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ffnjm6ncrjrode6vng71nab2li/77713296468.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/7b6672a24450877827b9b54b04d9367a/funabivonaxotaf.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/retoje.pdfIn PDF document text
    • http://keluargamimpi2.com/contents//files/jibazafowigesomokupu.pdfIn PDF document text
    • http://waypl.pl/upload/File/93350748891.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/73545488647.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/31329686413.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/takasutizenaxemodaw.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/folaminuwesepezebumuzofu.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/aumvlc7r1vls7sogoa0g04hrb5/83701758990.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096568f52a0e---80695875941.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/33e3165b016fc7a50fbca30f5f34013d/88178399617.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/34512354902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=captain+america+the+first+avenger+stan+leePDF 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_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 25708 bytes
SHA-256: 6d559fbf87e5457adbb1317c014559d4593e6d0b946faab6daad5106fe2ba4c3
font_01_sfnt_off000135ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E01 10904 bytes
SHA-256: 9aa5b9777bca89eed515954feba2be6b8ac4ef42e9cd567a18780bc75668d547

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