Malicious PDF — malware analysis report

Static analysis result for SHA-256 130d7db279c02492…

MALICIOUS

PDF

74.9 KB Created: 2021-03-29 00:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b225f8c1b11dc7586172a3ffc6889e1b SHA-1: 51f43c9c84307878825ba87c740cf5130fed1896 SHA-256: 130d7db279c02492ea748629123c74b83e69ed9600c90e1c5e4eefbedf7c5bcf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=long+or+short+preamble+reddit PDF link annotation
    • http://zifefok.22web.org/android_graphview_x_axis_date.pdfIn PDF document text
    • https://cdn.sqhk.co/figoveraboj/WjgkHHm/misirezejasupupogaror.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/f3fdf02ad.pdfIn PDF document text
    • http://gukolifuk.iblogger.org/koneb.pdfIn PDF document text
    • http://bamovewube.22web.org/resumen_del_libro_inteligencia_emocional_de_daniel_goleman_por_captulos.pdfIn PDF document text
    • http://duvakemofasomig.iblogger.org/10174459487.pdfIn PDF document text
    • http://fabulouss.space/549630090355l2bt.pdfIn PDF document text
    • https://pigokujedaxe.weebly.com/uploads/1/3/0/7/130740563/a308fab68b148.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/S47gdji/medilifojikono.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/hdF91Mb/lokipibumikajawevu.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/guful.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_60409faabc5e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_6016f5ab83b07.pdfIn PDF document text
    • http://regvoolkim.website/mod_among_us_always_imposter_androidkdcqw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5fee0d3ab4601.pdfIn PDF document text
    • http://passive-income.ru/finite_element_method_in_matlablg4z0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://logupenevetisi.epizy.com/towowibukomilomunijuk.pdfIn PDF document text
    • http://poxipepeti.epizy.com/12733969246.pdfIn PDF document text
    • http://muwiliwus.epizy.com/how_to_program_key_with_techstream.pdfIn PDF document text
    • http://jitemawuvefogox.epizy.com/agathiyar_movie_video_songs.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_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 5456 bytes
SHA-256: 6ab4215745d11f2448935585117e3e256328cd890e91de9485e121b165af636b
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10716 bytes
SHA-256: 943acbd3c19848db5c98e47438582129a72feff21568398752bf5868178d5293

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