Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdea84526fa502c2…

MALICIOUS

PDF

85.0 KB Created: 2021-02-13 17:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a062400e93a19c0dd50223dbae08a2a2 SHA-1: 41835425012926fa76060b950beea1332bfd53ce SHA-256: fdea84526fa502c2d85f3d224cb890a810b9ae256c993e4fcb7e527ef8c14213
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution attempt. It contains numerous external links, with several pointing to potentially malicious domains, suggesting a lure to external content. The PDF structure and embedded URIs are consistent with attempts to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wb?keyword=chinese%20alphabet%20symbols%20pdf PDF link annotation
    • http://detonicinitalia.website/inferno_tower_clash_royale_deckn5l46.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/hax7Gji/download_euro_wood_cargo_simulator_3d.pdfIn PDF document text
    • http://wejnpowk.space/ssr-_ep_125_manualwkx6e.pdfIn PDF document text
    • http://gafegenuwegapok.iblogger.org/zisejufo.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/gjTdBsr/bowmasters_game_free_download.pdfIn PDF document text
    • http://appletopshop.ru/nccer_core_curriculum6feft.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/jdBhfe1/red_or_blue_loctite_for_gas_block.pdfIn PDF document text
    • http://slmit.fun/tie_dye_champion_hoodie_australiaoh8dq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_60278e67a4833.pdfIn PDF document text
    • http://wowurilagufa.iblogger.org/59149275834.pdfIn PDF document text
    • http://rubeatyshop.xyz/ditofakiwirilezouvmk2.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/gcG1QuD/72769687588.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
    • http://najorenowodume.epizy.com/worksheet_converting_repeating_decimals_to_fractions.pdfIn PDF document text
    • http://zitejilid.epizy.com/tnpsc_departmental_exam_2017_answer_key.pdfIn PDF document text
    • http://pavasokunise.epizy.com/blender_materials_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5076 bytes
SHA-256: 586a11c1d18ab65d319e79d5a48fb153c88408e2bcaea613348c94c08a3b0734
font_01_sfnt_off00010099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 5240 bytes
SHA-256: 56504aecb62a23a774d03b52090306e851043a1752ab706456da2ec24559fde4
font_02_sfnt_off0001123a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 12452 bytes
SHA-256: f253de8d0526f18eae8d80add6d3be6a40cd322306d93c2167260c9d7553902d
font_03_sfnt_off000138a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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