Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59a56896a12b18c…

MALICIOUS

PDF

71.7 KB Created: 2021-03-03 02:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3cb39b45790506eb20c61dcca750feff SHA-1: bc42f48320ddc9fd018f97f36185afc0518d05ff SHA-256: c59a56896a12b18cff8e6790fdaeef1775cd5a7110d80b28b650c833c88c9878
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to various PDF files, likely serving as lures or further redirection. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic suggest it's designed to redirect users to potentially harmful content.

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://soxebez.ru/123?utm_term=lg+32lf500b+remote+app PDF link annotation
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/xevifelaku.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/WgjThcD/all_album_audio_song_tamil.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/cdeae23f76d7.pdfIn PDF document text
    • https://zogelamugem.weebly.com/uploads/1/3/0/7/130775951/polalosojubu-jipebotubaf-fipinejox.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/mavijaxupeserel.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/fadimos-tituxafibed-kiradukexu-velepajokezoz.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/6a576bb0274b77c.pdfIn PDF document text
    • https://gitokivoj.weebly.com/uploads/1/3/4/3/134316846/gasup.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/cMbjgHY/passion_fruit_green_tea_bubble_tea_recipe.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/letoxerutuwen.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/ifwokSW/racing_car_games_download_jio_phone.pdfIn PDF document text
    • https://gukevejulolun.weebly.com/uploads/1/3/2/3/132302942/d0c62558.pdfIn PDF document text
    • https://cdn.sqhk.co/lokovipazal/gfUihhj/war_of_independence_usa.pdfIn PDF document text
    • http://mijudivoxobo.iblogger.org/sizixigofiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xorabaza.rf.gd/color_word_worksheets_preschool.pdfIn PDF document text
    • http://vujulazi.epizy.com/the_art_of_communication_download.pdfIn PDF document text
    • http://gamovomubapo.rf.gd/counter_strike_1._6_apk_data_android.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_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 5688 bytes
SHA-256: 704a367450e38b6c65a1d79f9727dcbffc60dcd096de20eebf1559cd4846a444
font_01_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 10896 bytes
SHA-256: 008ab066124f54e0310e10adeffd2c02889f050a3c1262627942f0d6a032450a

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