Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea26e2936645f7bf…

MALICIOUS

PDF

73.2 KB Created: 2021-09-04 03:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1a85a82cd217c69922f76c26555b19c SHA-1: 84102344920dfdd833dbbc4e8885593c4d90aeab SHA-256: ea26e2936645f7bf21ca49f983e3be8619e9fc9682415483537d3c1ce9c8b2da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads and disposable domains. The primary purpose appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/0d714f3b5f1435e8d07508bb79a1610c/dufiwexekedofuwenizemeluv.pdf In PDF document text
    • http://thevelascofamily.com/clients/11614/File/toxoj.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/15450263053.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/kuvupovasezon.pdfIn PDF document text
    • https://makenie.com/upload/files/mitituvaxovedibuduzozu.pdfIn PDF document text
    • https://12shio1.com/contents//files/mapirugigapezoruludunogov.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/junegodilixa.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb4d40acff---zudemerabadoxoruninadoto.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/tegezasivekar.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/70841185073.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/kodenoremamulewajudowe.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bvch0k0069ucn3cfl6t5g1ffio/kebovulavu.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/c0a5c198e537e8ce38ee4278aba7f125/nelisuwadopowikexexupune.pdfIn PDF document text
    • http://kd-council.com/upfile/files/57918344647.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210624032553.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/wipuwezoni.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846cd0320df---83630889879.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/3122635191.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608647cc5b0ad---50002233732.pdfIn PDF document text
    • http://gangwontaxi.com/FileData/ckfinder/files/20210621_DF0BE01905F52062.pdfIn PDF document text
    • http://heyibnb.com/CKEdit/upload/files/70706072299.pdfIn PDF document text
    • https://yuh-tarng.com/userfiles/file/libawajebeda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=healthy+recipes+in+spanish+pdfPDF 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_off0000bb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4E 10700 bytes
SHA-256: 2fab253affd21ebddcb34b70948387f0e599191172acde3f69106abd951a8eab
font_01_sfnt_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 16976 bytes
SHA-256: 53a786c7f22247429cebfae93d35d975b810f8eb573c451f14979c41971f127c
font_02_sfnt_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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