Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14fab16ecd20320…

MALICIOUS

PDF

81.5 KB Created: 2021-02-24 22:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73d81708480546fd260bbec15fb4ca1a SHA-1: 6e6c667af7f592b8aacbca804b8dc2a5685ebd41 SHA-256: d14fab16ecd20320a72fb261b0ccf3d57722bd8fda5eba3196715e43f69b3618
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Round table discussion activities', likely a lure to disguise the malicious intent.

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://druttle.ru/123?utm_term=round+table+discussion+activities PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412778/normal_6004829bd56e3.pdfIn PDF document text
    • http://erethiztzj.space/mad_max_fury_road_full_movie_in_hindi_download_coolmoviezvm2h1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_601f9944aec95.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/7399552202.pdfIn PDF document text
    • http://edaruzal.xyz/kamatotatnd9c9.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/56538519310.pdfIn PDF document text
    • http://igcopyrightverify.com/chandni_chowk_to_china_song_pagal87rdq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vesubodufisi/kali_linux_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/deckers_co_weather_report.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/was_the_3rd_estate_started_french_revolution_and_wrote_1st_constitution.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/15432561057.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/lumawimejapuboruposoji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 4928 bytes
SHA-256: e72090d0151e57c45a1e01bf053e36d00c82104ba2a78ebb2821a5e5ad983b74
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 10736 bytes
SHA-256: 662a0e8bd877ceaaa7d6cf88fe4b48bc1f5c07016ce95c6ebfa8fd3894462186
font_02_sfnt_off00012b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B03 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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