Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bf8ef4ccd1cadc…

MALICIOUS

PDF

90.9 KB Created: 2021-07-26 03:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3d9be8f3111b67f886afa0a30eaf2a2f SHA-1: 13214b74433f04ffecb9907b279047ea1ec869be SHA-256: 17bf8ef4ccd1cadc540c42d78c92753c0933cd056d45f5754e278606d92bb7ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate an attempt to exploit users through deceptive links, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ff1ab22a---27281635082.pdf In PDF document text
    • http://vivaibonomo.it/userfiles/files/50248743923.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b448dd4668b---52463753758.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/24689838103.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/84030386924.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f72f1bef26---zejunewimekebopijak.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/41669230389.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/wigoxopimuwafekofezajax.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/ludid.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/0f3e61e86743fe17210ff5ee6910baf4/68601729407.pdfIn PDF document text
    • http://grupophi.es/uploads/files/nebagal.pdfIn PDF document text
    • https://epiphanych.com/images/file/54728913548.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/bagedubonulezuboleteb.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/23116367647.pdfIn PDF document text
    • http://web68s.com/upload/files/42379119449.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/mologapagafurujut.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/jagujatetebulela.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/54142417565.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/lujefavagewowozetuz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ce66877c2---62520365710.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/kijonofedezamuzofodefipe.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/82876623373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=fitness+tracker+template+excelPDF 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_off000101d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 10588 bytes
SHA-256: 1747f23c4ec4a75cc66b154b7570fd4c85883b76f7da604025dae63fc25d12c6
font_01_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 17024 bytes
SHA-256: 7d74ed9a0ae59e59804c73034a90babfeed8b49e9bb87b4592a53d025c069628
font_02_sfnt_off00014681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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