Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7eece95b1448d1a…

MALICIOUS

PDF

81.4 KB Created: 2020-12-23 04:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 25f64d8f302cfd72fad40eacad228ec0 SHA-1: 1c4376822ddc59ad26404b900cdd9d52bf116a4f SHA-256: e7eece95b1448d1a516ccdf639be5639f2da260eb44caee93d038f15515063af
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting or known redirectors, indicative of a link farm or SEO manipulation scheme. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient evidence of a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://traffmen.ru/123?utm_term=elite+dangerous+planet+guide In PDF document text
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/sewetan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5fc52d9fa5d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5faaada64560d.pdfIn PDF document text
    • https://futivodefumir.weebly.com/uploads/1/3/4/8/134861147/lowedili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_5fb98157aff57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f8f9fa385bbd.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/denuvigux.pdfIn PDF document text
    • https://ditutemisa.weebly.com/uploads/1/3/4/3/134381329/3049e6daae815.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/lufuxuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1d4bda6d74665ac69649/1606229323669/xowanadame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1885e2-61f5-449b-af0c-be485e17b22c/english_anime_dubbed_websites.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1dfe9fc3622d5225d5f/t/5fc3250a3f75b166433b5248/1606624522677/38874853008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501ba43a-37bd-4aef-beda-7f15e42fe1ce/40606936271.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf267f51e6b539731d1359/t/5fdf5fec8afbbc2717708b05/1608474604970/charlie_chaplin_2_video_song_hdvd9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 5084 bytes
SHA-256: 3b7516cf066d7cac8e5090ac1802cc777db19de2b5c002d29857f09bd0488b76
font_01_sfnt_off000106cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F58 11680 bytes
SHA-256: 8e68bfc7e9593fd4ad6ee0da5bd716961bac05e27e3f9774d34a45086f3a929d

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