Malicious PDF — malware analysis report

Static analysis result for SHA-256 0021636077e40397…

MALICIOUS

PDF

81.3 KB Created: 2021-03-23 10:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7c809ed47ffdc6109aed4d8c7fac852e SHA-1: 9d8a739c507a4369ff1aaff2f5fdd7dd3e33302a SHA-256: 0021636077e403973a29c241a43ba58622417af0d07bf20ef4f6e3f7798322dd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying it as a link farm on disposable hosting. One prominent URL, 'https://resalured.ru/wix?keyword=golf+clash+hack+apk+2020', is flagged as suspicious and likely leads to malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/wix?keyword=golf+clash+hack+apk+2020 PDF link annotation
    • https://cdn.sqhk.co/fetebutujo/Rgigghb/horizon_blue_cross_blue_shield_nj_direct.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/ipa_transcription_exercises.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/lojixuwonevitalutozunos.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/cancer_de_colon_definicion.pdfIn PDF document text
    • http://mexicotop.xyz/bella_panini_grill_manualmlkb1.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/bAsOUr5/daxuvigusonofubiji.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/72507952264.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/searchs_on_iphone.pdfIn PDF document text
    • http://wonnaturila.space/kenmore_700_series_dryer_belt_sizexuvqg.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/ojbSeNn/zopotesalabi.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/1694407822.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/ablative_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/Eltgcja/draw_a_stickman_epic_walkthrough_level_3.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/hdjiijw/47808786878.pdfIn PDF document text
    • http://igcopyrightforhelps.com/flip_this_house_decoration_home_design_game9m7od.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/xivuforavewazepavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d41273-4f6f-4f48-945f-5e1bb560f824/66571404568.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/sinusadopap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f428c96-6143-4bec-ab1b-b73899b78054/voxodulelifire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a7d29e-34bc-4f5b-b350-809f241e5191/how_to_take_pictures_on_lg_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a57d90-6392-4517-b8e3-a1902f44bc2c/singer_heavy_duty_sewing_machine_4452_user_manual.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/devewodekorigimoza.pdfIn PDF document text
    • http://gefuwaw.atwebpages.com/43994032036.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/battle_net_launcher_ing_new_files.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 5376 bytes
SHA-256: 5d572f305d208a6d9326f809a9d762a02b3c9c2d8cfeee117bd80196b0cb07e8
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10508 bytes
SHA-256: 81d251cf71dcb1b6077470c65d51ad81db9b10236121b37e829eca11518e752f
font_02_sfnt_off0001226a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226A 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8