Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be880831008a1fa…

MALICIOUS

PDF

73.4 KB Created: 2021-02-03 07:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 700e78ab6360036734f1e0fbdd8da2c2 SHA-1: 64333ed95cba2a1ef4fd3d3b7f87cc3a0a8e702e SHA-256: 9be880831008a1fa76c40ab1622911e3d593d69648b0c486766ad89a587b7891
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=clash+of+clans+mod+apk+free+download+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496146/normal_600f80ef26f4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426701/normal_5ff86d3aa3c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fe9641773649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_601747afe5319.pdfIn PDF document text
    • http://wukosemat.22web.org/plural_nouns_practice.pdfIn PDF document text
    • http://dawavuwera.22web.org/free_template_for_beach_wedding_invitations.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406497/normal_5fee2aaadb2f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5ffb446d52f3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384296/normal_60017f8f6d051.pdfIn PDF document text
    • http://tivewuba.iblogger.org/anbanavan_asaradhavan_adangadhavan_movie_video_songs.pdfIn PDF document text
    • http://pejofewetoz.22web.org/cypripedium_formosanum_pflege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384301/normal_5fc82d7b826f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelawezup.rf.gd/tenant_eviction_notice_template.pdfIn PDF document text
    • http://wexiwukivenuxaf.rf.gd/7272830931.pdfIn PDF document text
    • http://vogojitipam.epizy.com/bajrangbali_ka_photo.pdfIn PDF document text
    • http://ziboporo.epizy.com/23401077083.pdfIn 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_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5508 bytes
SHA-256: 0f25dd98313015051ce8de2e0e04d7a5ee20eefe8dbe79105f9164c6d9204ced
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10220 bytes
SHA-256: 14dcdab5df57f1a90fd32a294a6a0b8ccffeda84adbd3a598bf682a6ffd44bf5