Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0580e174cf46873…

MALICIOUS

PDF

79.5 KB Created: 2021-02-22 12:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d4abdb8aace0c104b4cd6e70292d4616 SHA-1: ddadfbe4a12ef47ef7cadd9c59b645ff6362c84e SHA-256: d0580e174cf46873b0e136e993aa183c2760c4d2373530812c4327de62ddfc46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being `https://crophysi.ru/strik?utm_term=frases+de+daniel+goleman+inteligencia+emocional`, suggesting a phishing attempt or redirection to a malicious site. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to host these links.

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://crophysi.ru/strik?utm_term=frases+de+daniel+goleman+inteligencia+emocional PDF link annotation
    • https://jatakusikafe.weebly.com/uploads/1/3/0/7/130776866/52e2576ff65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460447/normal_5fd37e8f5560f.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobigawe/jgchaij/insta_bokeh_blend-_square_blend_camera_photo_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/cqhfWie/smiling_face_with_glasses_emoji_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384821/normal_5ff7d9fa85c16.pdfIn PDF document text
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/kebarajezibagex.pdfIn PDF document text
    • https://mumotajesok.weebly.com/uploads/1/3/0/7/130738730/44a9fa62df6.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/48f3a8c4b.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/480ee.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/4506644.pdfIn PDF document text
    • http://webpost.pro/does_alice_really_die_in_the_magicianschg1g.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/dhiCgfx/87010351870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fd16ed9451c7.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/hjOijix/dirodugefozuxonilalux.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/2576300.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/tejuvonixag/99906965852.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/arcgis_viewer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/line_graph_worksheets_year_7.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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 5216 bytes
SHA-256: be9c753e4994f649008c87d0466cb4a9a39cb9b2e3b999ffab269b6da06f8cd0
font_01_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 12264 bytes
SHA-256: 33670b5a1e34fa9c4250a3e7623e2588c9806f26728069c94f64c1a82c74f62e

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