Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f333deea2cc433…

MALICIOUS

PDF

95.2 KB Created: 2021-03-29 12:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b0dc2b3ee7c603dc4a8f8dedae002fb3 SHA-1: ba88edb2a84b1063490fe0bb11ff3eb1dec3da53 SHA-256: 74f333deea2cc4339b624b542c6ba9eeba15c3899f17bff20f2c007358d11d7d
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 critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming attempt. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=russell+westbrook+high+school+ranking PDF link annotation
    • http://libutulidux.medianewsonline.com/waddington_spelling_test.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/ahhisjj/hitting_under_the_golf_ball_with_driver.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/density_of_dna_decreases_on_heating.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/2342931.pdfIn PDF document text
    • https://gurobikawa.weebly.com/uploads/1/3/4/4/134467096/vopufi.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/pepawex.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/hc3iihd/7212886942.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/atresia_pulmonar_con_septum_intacto.pdfIn PDF document text
    • https://susatabunek.weebly.com/uploads/1/3/2/6/132695662/jevare.pdfIn PDF document text
    • http://bijipejip.iblogger.org/lol_twisted_treeline_guide.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/vabalaxarup-laxokolepipa.pdfIn PDF document text
    • https://pozategon.weebly.com/uploads/1/3/2/6/132695347/f9e6a6ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwuzodoxomox.epizy.com/psalm_50_1-23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/513415a1-ff3b-4d89-bdf7-8596d1e8f3c7/rizusom.pdfIn PDF document text
    • http://nanomunem.epizy.com/xafufigedurexalaro.pdfIn PDF document text
    • http://negorox.epizy.com/school_building_design_standards.pdfIn PDF document text
    • http://refubexat.epizy.com/bypass_google_account_apk_without_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ef0f3e-b040-4148-8906-664662d6ab61/what_does_joker_say_to_murray_before_he_shoots_him.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1c109a-c327-4acb-8c78-8f5aa90ac47a/tovesawejukizadi.pdfIn PDF document text
    • http://zilatinevosageg.rf.gd/creative_writing_worksheets_for_adults.pdfIn PDF document text
    • http://mepitar.atwebpages.com/alucinaciones_visuales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f723b2-e95f-4066-bbfe-3ab91fcaa661/67700259793.pdfIn PDF document text
    • http://vimomata.rf.gd/kamus_bahasa_jawa_lengkap_dari_a_sampai_z.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_off0001366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366A 5364 bytes
SHA-256: 49260596cba0792f0482a0dbe2a5de09ea6d7a48bb8b4f165c96ff296e3a5e4b
font_01_sfnt_off000148bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148BF 11152 bytes
SHA-256: 580d0b737e1060e7b99ee4429a3b909317a93a6a7eb0b3ee571c2f4a8b2161d8

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