Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17593a612330320…

MALICIOUS

PDF

69.0 KB Created: 2020-12-25 07:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f08e26ce28cab19fc545eff7ec856411 SHA-1: 7acd3f5a4f2edf548c3ca16cf939b4b57c27fe21 SHA-256: c17593a612330320d8ea977cc74abc72ff10a54be8c0aa18821a346966df84b5
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary function appears to be acting as a link farm to direct users to potentially harmful external sites. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=cake+decorating+classes+slc+utah In PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/c98cc5429313a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fca92285cf90.pdfIn PDF document text
    • https://cdn.sqhk.co/neguvobipa/B1jiNhj/76127113625.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/mevinunaj_maxivudowije.pdfIn PDF document text
    • https://nudonadutosaj.weebly.com/uploads/1/3/4/5/134595964/8cd1bb0fb08f.pdfIn PDF document text
    • https://cdn.sqhk.co/xizowabik/1bievrm/tales_rush_mod_apk_1._3._2.pdfIn PDF document text
    • https://wixofixun.weebly.com/uploads/1/3/1/3/131379115/beliliwumufob-lumubajexibut-lesotegawanex-libibasujan.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/pilomob-laranivez-fakamebatav-zisamibubuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mipizaju/99673292693.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/le_chatelier_s_principle_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c446e4a7-404a-4207-98f3-1bab9b69a859/93825469265.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_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 5172 bytes
SHA-256: f8cac309208f771e92ee691ae4e1ac6084aa08e2d47ca5658006d16e02d80d54
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 10964 bytes
SHA-256: 1a90d7265341798ce151ebb4ba2fb472cd00d4daa2dd7e7471295d63429d9373

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