Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ab0a5506d0c2b3…

MALICIOUS

PDF

125.4 KB Created: 2020-12-06 16:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7668e1bf2ca39209f54bbe353ad5aaf1 SHA-1: 26c3d33ceb513e9c06a3eda39112efd69dc7199e SHA-256: e0ab0a5506d0c2b31b7dca7787d7b211858085e6debebc7021d5e0a0824db14b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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
  • 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.
  • 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://trafftec.ru/strik?utm_term=luke+chapter+8+verse+22 PDF link annotation
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/8948494.pdfIn PDF document text
    • https://nilumasukezag.weebly.com/uploads/1/3/4/4/134401113/kosesezo-bamum-jifexi-xuvegavef.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/234df33f5a.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/66e4c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fbe96fc98fe5.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/1313365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fc95d18af28a.pdfIn PDF document text
    • https://rukutatonaneto.weebly.com/uploads/1/3/4/0/134012616/jinixuzasigewa.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/5fbfd016c30a162e0c4c3cab/t/5fc607f7fa04221c71eeec23/1606813687616/2974789516.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/kezerikodarotenidazesokik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8eeb7ee8e70759e3b50/1606220016271/hot_shower_lyrics_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47f673d-9d1d-41d3-a753-016cf88a0438/dopuka.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/compound_and_complex_sentences_worksheets_grade_3.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_off0001a441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A441 5380 bytes
SHA-256: 5e445e08b66f443ae8697faaf87332e3b0889b8be34d0938302935d934cfbb39
font_01_sfnt_off0001b693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B693 17052 bytes
SHA-256: efbdf827ea8a7f57d5138df84abed26a794df6909cb0a31d090c7e2caf6dba20

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