Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3a00b7614494a5…

MALICIOUS

PDF

75.0 KB Created: 2021-06-10 22:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 008ff8d9acac94fe2ab5a94cfe388716 SHA-1: 00fae3a5bad2da3e248fcc0ac9b17fcf0c727a51 SHA-256: 2e3a00b7614494a5c839118f721f1a7a6d1dc450c0bf9e2296c4e9baa876be22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit user trust by masquerading as a useful document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crysiq.ru/uplcv?utm_term=baseball+cap+template+illustrator PDF link annotation
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082528656535---mixarilawiwipe.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d8249f12890ee7c3ffe052e524e38ae/32242692746.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/87ad1b2ce94271d8e59ece884e2d5d9a/wenivirigewejegebosi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab3d9c9dcf---28691557548.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b74aa9f9---28574625958.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/56199272479.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qhj7q8cegihqvqp2gach6f8n4k/kozavotijixerowefik.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f119e3a5ae---giloke.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/96cd5ed7d0dd71ce1cd5daef4f398c30/31570894535.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/76604110959.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/vipudadaweg.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/1870258f8a9eb91beaac7272b99d5ede/bexopuva.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/16147208607.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/fajowaduwavekumuzumivanij.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tkirthhee140bkm50fmecfmpv3/48284958106.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078e48f4ab79---36257957251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 5268 bytes
SHA-256: 2e5af7e6b2530e948c8ecb05a93aa4f779a881d2538eedd4feaefc5906c29dda
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 11192 bytes
SHA-256: 1b645bd910fb8e1ea29e4fc463630d45761b57228cd09d12804c30339aedb71b