Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea37f6c2fb17390…

MALICIOUS

PDF

86.3 KB Created: 2021-03-18 03:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 793010a0a3c2276fdd54178d9af799a7 SHA-1: 1c247918a953beff880d9b087a4aff03d7b9e28c SHA-256: 4ea37f6c2fb1739009cce0a466113356978a0875b8b2ca6970784aeef46b3f30
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, https://bologen.ru/strik?utm_term=linear+timeline+of+marvel+movies, appears to be a lure, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/strik?utm_term=linear+timeline+of+marvel+movies PDF link annotation
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/5410354.pdfIn PDF document text
    • http://nozumupi.medianewsonline.com/gegewelut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fdd49bbe2a44.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/nenemoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_6050e8fc948cc.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/traductor_google_espaol_portugues_brasil_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_60192c33b8b9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_60092e78061d0.pdfIn PDF document text
    • https://litunuvojiv.weebly.com/uploads/1/3/0/9/130969221/8566732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6015287f0e9d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_7a4e30c5a10e4108baac635a912e0eba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jakujakula/craftsman_edger_trimmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7823cfae-f9ea-4edd-bbf1-435e7fae3720/xinodokibule.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_4fdbc650aec34d728cd8c976c3a5f6d6.pdf?index=trueIn PDF document text
    • http://wipibefab.onlinewebshop.net/modern_automotive_technology_filetype.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_b68aebd066f845d18fe6f202b8f6316f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/genesis_coupe_auto_vs_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/73051809986.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/google_form_responses_not_showing_in_spreadsheet.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_df976078d8a14818a14432927c8ca69c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/vomuvebezokagax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ad2d3b-0176-43e7-9c97-5387cf0baa19/omron_hem-7120_automatic_blood_pressure_monitor.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_off00011160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11160 4912 bytes
SHA-256: 0b54ac0cc8f006c490ce0c46a85640914aa941dd1a4b79a04f6b2a3b7e595a75
font_01_sfnt_off0001220d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 11796 bytes
SHA-256: dc1e4c22fd692733e19361431183e102ed810e9b2ef548087d6dc52954de9753