Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f17d2f7e5d3470c…

MALICIOUS

PDF

87.2 KB Created: 2021-09-19 05:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: abe188e002fbdb07b97df9fd0b016f3f SHA-1: 76dfa56d4b569401a8eb5d37890414cf80366659 SHA-256: 6f17d2f7e5d3470c5492bfa5d4d0a54738dfa9c667cf216f4b353894e3230d12
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://creationart.hu/files/file/22424604601.pdf In PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5cf21393064b4e2630fbf20cca7aca53/12821172076.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/50372492049.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16142eec352e44---tuvadojesijavo.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/67886811121.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/82583812610.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/dinoroxuma.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613797c36e4fe---bifolubezetunudamo.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/ludijen.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/81c7e0b36dde8d61ca386697ceacdc3b/49461184355.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/41627438254.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/79921075062.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/76108111212.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/63858389196.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/99033595325.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dfc96ae11---81562451641.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/93873070308.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/mazidavokorome.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1bef40846---sodozibixarus.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/33006337297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=snood+bubble+shooterPDF 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_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 18024 bytes
SHA-256: 28341f5084287df522a0d6e4ba4953c40b402df6a85d8214bf0de965cf1b4908
font_01_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 10408 bytes
SHA-256: a9f6b5325ce3ac4b05f6a080c66392a02b1278845bf860ac17ded4fc8daf22a4
font_02_sfnt_off0001373d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1