Malicious PDF — malware analysis report

Static analysis result for SHA-256 d919580fe961a9fd…

MALICIOUS

PDF

102.6 KB Created: 2021-04-01 05:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59ee871fc0e469625ab0fb74ebd947ae SHA-1: 74139cff86b5fd44a304b235a7a177d63086b9cd SHA-256: d919580fe961a9fd99d2688533ebedff09a0765f8c31bd9e70475abcd0e47935
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=sexual+reproduction+definition+in+science+terms PDF link annotation
    • https://cdn.sqhk.co/xupixawina/btiiigx/i_remember_you_song_from_queen_s_gambit.pdfIn PDF document text
    • http://winoorama.website/xegibusegaxitafie7bg3.pdfIn PDF document text
    • http://study-english-04.space/51798487649tdnix.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/whipgex/gujunexawapoxilavene.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/volomivowowezatoxene4notv.pdfIn PDF document text
    • http://arenda-comp.space/20513322257f4c0b.pdfIn PDF document text
    • http://itslm.fun/wavezazibiroposikdiu8q.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/3heAidb/71253660164.pdfIn PDF document text
    • http://fukebomodipaz.22web.org/medotexewisazupudaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/RQeyicT/dalepuvefofuxenepin.pdfIn PDF document text
    • http://sazodad.22web.org/biblia_excel_2020_chomikuj.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://fofifalog.rf.gd/giripobe.pdfIn PDF document text
    • http://sotunisa.epizy.com/la_vida_precoz_y_breve_de_sabina_rivas_pelicula_completa_repelis.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_ed642d9b95934938803fada201592faf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82388731-0a4e-4af3-8d2d-213f2a1fc596/56777550957.pdfIn PDF document text
    • http://kipamorilezux.epizy.com/8325926263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6c7856-b095-450e-9b00-397bee80cf7b/krups_gx5000_coffee_grinder_not_working.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_9dbfcebe431c4616bb003cbd4255fb1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1439d208-c4a0-4c27-9089-539753a97b86/solid_wood_office_desk_canada.pdfIn PDF document text
    • http://zijilevigapoxo.epizy.com/5th_grade_math_curriculum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a857d4f-9ef3-48df-8694-cd01a4a22d0d/wagitakubige.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/59788882339.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/juralixoguvopidi.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_8286b8d092af422aab4d331e7937c0ac.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001442a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442A 5352 bytes
SHA-256: 4239d7bac9e57f9b42b97812920e45531d0425c4ecea595bd7a30ec44554c56b
font_01_sfnt_off00015644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15644 12012 bytes
SHA-256: 7c22ec0d0bfb2d3075996a75966bfe33dbe7d0f9b21270e3f4d96293feb27320
font_02_sfnt_off00017e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E42 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f