Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e751d4fc085f49e…

MALICIOUS

PDF

67.8 KB Created: 2020-12-18 22:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3822be761f73b2dc3689c70f8790a0e1 SHA-1: daa8203c15cdc89db6e518410fbd8f57a420c072 SHA-256: 5e751d4fc085f49e65a982d67042082f4a72c6408b687275b3a28ad1db5901f5
252 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, many of which point to link farms and redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the 'hesperia parks and rec preschool' lure, further supporting a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?utm_term=hesperia+parks+and+rec+preschool In PDF document text
    • https://ratisajaruniz.weebly.com/uploads/1/3/1/4/131455275/b92a3ae00.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/bulekerog.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/2c04bc9ce9fbe.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/5909461.pdfIn PDF document text
    • https://wemoloxemud.weebly.com/uploads/1/3/4/6/134603697/b5ca84046c560.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/9887552.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/889bb90.pdfIn PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/wadabufi_rilaj_jojotatabotavew_kezunesivubosu.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/wifej.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/5fc0c362403f5353fd950a5e/t/5fd0d9101c49363a9b5520d9/1607522577129/no_crop_spiral_photo_editor_filter_effects.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ef5cbe9b69395124a64b/t/5fd01904a040431536b1bff8/1607473413656/red_button_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75a9723-b501-4174-85f1-ce4e67571c19/alif_novel_complete_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79d1dfeeefa0c0b62eeaf/t/5fcd927174a40730fbb2aa43/1607307895210/autodesk_character_generator_review.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_off0000cb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9D 5184 bytes
SHA-256: 082f4aea47209de9d0bfde17cd049b1985e8227b26bcba873476bcab6dcd3515
font_01_sfnt_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 11068 bytes
SHA-256: 55f2f59275d35ea07769f0c8748b8ce314d396aa79268dd3f7a02e26e7765839

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