Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5705e4f3f96dd0…

MALICIOUS

PDF

96.9 KB Created: 2021-08-13 22:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f2cd277fb6e521eb7e8c44f49f4651eb SHA-1: e8b9562e818d97b4cb2bbe24b6436869c387f806 SHA-256: fb5705e4f3f96dd0f61e63f4355914f62fe2dfab62fcd25e64f0c28c59a2c08d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised or disposable hosting services, indicating a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the link farm suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://unique.global/wp-content/plugins/super-forms/uploads/php/files/6fe65cacc13dc6a2528152bda71df788/88084936129.pdf In PDF document text
    • http://zzzwchem.com/upload/files/38052901044.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/julokirurojuf.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f042b2d1f---97498367333.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/vezagesawipaposibawi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e968291b0ab---3035597959.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/raravavup.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/88797938038.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efdc766c86---tisuroworetamozowebuzelol.pdfIn PDF document text
    • http://aimic.com/userfiles/file/ninekuni.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/39590299253.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1b09d204f---duratazavifaluserigivi.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b2bcf527dba8fa631a58c4c1ecc23c10/27732881429.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/568bccf37e71627b414a74909ba0332f/51429294918.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/74897287548.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/waduxi.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/wizutuxemabavobusu.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/82916506004.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/1848984bf399cc699e17a71a406bd0a5/81458923747.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d2b4967f---38267854001.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/xowisufav.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b353c345107---27659702810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=livre+physique+chimie+seconde+hachette+2020+pdf+corrig%C3%A9PDF 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_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 11800 bytes
SHA-256: 7a0a2260d8b8eda61f6f007c3cab85c04d25b81ea0fee2735c5bce33ec20687f
font_01_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 20856 bytes
SHA-256: a950a9c070dbcc6a26fb0c6c8a0d6b9cb0e8a0965c589aea99976f64b48621ce
font_02_sfnt_off000159a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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