Malicious PDF — malware analysis report

Static analysis result for SHA-256 082a4ce72b176250…

MALICIOUS

PDF

92.5 KB Created: 2021-03-21 11:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ae130ff1c5152bb5c3ef67831e2372e0 SHA-1: 4ccb79c88dbe008e2932b7351325279eda4b16aa SHA-256: 082a4ce72b176250027c275a40eedabe74103aaaac6d7b73dfaed1779299508f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://midufefew.ru/award?keyword=ahmedabad+brts+bus+timetable+and+route+pdf PDF link annotation
    • https://cdn.sqhk.co/fezifenax/bMggcxv/pixelmon_mod_for_mcpe_1._16.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/iNagggg/slither_birds_crazy_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460076/normal_5fcaf300f1b82.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/ujgRicj/97290721491.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/dShjBgf/wrestling_revolution_mod_apk_2k20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_6033dad047542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5fdd5dc1325af.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/writing_academic_english_ann_hogue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_6035a963ea87c.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/ehcaicP/99083153517.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/80807007575.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/dkFboje/juventus_third_jersey_2019_20.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/Jic9Fhi/pabujoxuvopa.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/ZLjhigp/48696033791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fd65bb0b4f0a.pdfIn PDF document text
    • https://cdn.sqhk.co/gizadomoto/CgcCNqk/60601076371.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/character_traits_passage.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/ghhfjeF/31658497474.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/1473bc3d-c19f-4a5c-9ee0-e83824c270b1/2018_honda_civic_cvt_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aba4355-24b4-4bb5-a5f7-93661f869594/rujuxegedidulawafisov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69c4268-d9c3-4fda-89b4-7f083cc36a64/99866810945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f269b25-51b6-4605-a02a-3db95b744f5f/los_siete_hbitos_de_la_gente_altamente_efectiva_stephen_covey_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa71975-a82d-494d-acae-798d87ab44c4/93362550750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ed3d1c-f38c-49f1-816b-5505329882d4/rapegawokigezorejupedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4f6033-7b19-4f85-90e9-8f857ee64b33/yoga_stretches_for_lower_back_pain_video.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/hoover_windtunnel_belt_replacement_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d539776f-0d95-42fb-97a7-8dfc3825460f/how_to_reset_a_honeywell_thermostat_recovery_mode.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_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 5412 bytes
SHA-256: c52d7f36be399e2ac6a3a35fcc95a2d5a6124304ed3cf9ffb67664f41738b0e6
font_01_sfnt_off00012541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12541 11440 bytes
SHA-256: 225840d44baeeff8716b5f3aa41bc4ded7681de9767dbd8d234567f3d433ba68
font_02_sfnt_off00014c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C60 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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