Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47316a7fd7f6b6b…

MALICIOUS

PDF

74.1 KB Created: 2021-05-16 10:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6807b8fbf0999b45dd09084543ab9953 SHA-1: 3c8868d67b9ec7b9b6d3dad62d07da2cdae561c0 SHA-256: f47316a7fd7f6b6bc6d7e89034bd5c4793709f313ab8df9823665996988a0b21
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including one that appears to be a redirector with a search term, suggesting it's designed to lead users to potentially harmful websites. The presence of multiple disposable hosting links further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=game+of+thrones+books+box+set+ebay PDF link annotation
    • http://visunuduxat.mypressonline.com/carte_touristique_bretagne.pdfIn PDF document text
    • https://zurokexotuv.weebly.com/uploads/1/3/1/3/131384071/7151312.pdfIn PDF document text
    • http://idealica-official-it.website/install_scansnap_s1300f3ncz.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/hhdPu20/27884825726.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/ferusezivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5fdb3450707f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_6027ea5f1b0b5.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/arvore_binaria.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/55371647156.pdfIn PDF document text
    • https://joxegozul.weebly.com/uploads/1/3/1/0/131070165/kexego-sadebadanuxelap.pdfIn PDF document text
    • http://speak4pro.com/red_blue_black_flag_country_name0q4cf.pdfIn PDF document text
    • https://xifepifedezuz.weebly.com/uploads/1/3/4/4/134495844/xezapikir.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/1JYzEYD/61376928306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paguxesij.myartsonline.com/what_is_connected_by_the_hypophyseal_portal_system.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/minazufarenalapezevewox.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/doxiwegixur.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_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 5380 bytes
SHA-256: 428973d17d9a72e782d63e9e96920fff98deca4d2bffa5b1f2abccad2a372a34
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 10892 bytes
SHA-256: 499f10965f9382fb7f1ab8e92d65a0cdfff61f55c10b9f0e9acd2ceaea62bb5a

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