Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5206ae8d0e2eb94…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 03:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f9359133f1a2c51add1cd59016724ebc SHA-1: d203997cdce61d1ff8222812db96544aa5dc9ec4 SHA-256: b5206ae8d0e2eb94849c70b84a3d924746ae5cea58b7e90a7c24385cddfbcfef
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=all+new+brio+satya+modifikasi PDF link annotation
    • http://jazeforip.22web.org/itunes_for_windows_8._1_64.pdfIn PDF document text
    • http://daravto18.ru/tawonabikozajori07xy1.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/8eb13427d1efa.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/EhdFgeh/race_against_time_eso.pdfIn PDF document text
    • http://evatopshop.xyz/xokupigptos7.pdfIn PDF document text
    • http://fimubokuka.iblogger.org/map_of_the_globe_with_latitude_and_longitude.pdfIn PDF document text
    • https://xujupowosorome.weebly.com/uploads/1/3/4/4/134485259/8409526.pdfIn PDF document text
    • http://shtampshop.ru/dnd_critical_hit_generatorfmuef.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/kieClib/55277830648.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/tchdVVM/wedaraxutebotabepupeted.pdfIn PDF document text
    • http://zemimumaloger.iblogger.org/cordova_file_chooser_plugin_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/a5jiBpH/entrepreneurial_mindset_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugurodegid.rf.gd/tidosugila.pdfIn PDF document text
    • http://begilokikilox.rf.gd/powerwolf_blessed_and_possessed_mega.pdfIn PDF document text
    • http://rakojuk.epizy.com/2017_gmc_acadia_repair_manual.pdfIn PDF document text
    • http://luxepiluwi.epizy.com/pulau_ubin_cycling_guide.pdfIn PDF document text
    • http://sabozet.epizy.com/65319455982.pdfIn PDF document text
    • http://fugewep.rf.gd/correcting_coliform_bacteria_in_well_water.pdfIn PDF document text
    • http://zikepodaw.epizy.com/merriam_webster_dictionary_apk_for_pc.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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 5440 bytes
SHA-256: 06a85a12f8d23a040fb0020383972206474b0fd7942342d895bdf51b4c5570a4
font_01_sfnt_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 10404 bytes
SHA-256: 3cca96b222ee825b2019c6ecf6bde361aafc92793001dec0823e210cb08f51b3

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