Malicious PDF — malware analysis report

Static analysis result for SHA-256 6079e6f8d9073650…

MALICIOUS

PDF

81.8 KB Created: 2021-03-16 20:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7e02900821a86c376234be3219110557 SHA-1: 9f2c850fee76ca9127355f90a8ef26e70c09aa71 SHA-256: 6079e6f8d907365007fd9f81cb90786d9d5b42051c9902af358351002504ca50
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to obscure malicious links within a large number of seemingly legitimate-looking PDF download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/award?keyword=humor+y+amor+de+aquiles+nazoa+pdf+gratis PDF link annotation
    • https://cdn.sqhk.co/ramawuvade/hd9WCjf/duvaza.pdfIn PDF document text
    • https://cdn.sqhk.co/nezipumosot/y5ghgg9/yesterday_beatles_tab.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/7856882.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/christmas_song_lyrics_in_hindi.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/smooth_santana_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/kidumDx/xofedelotobus.pdfIn PDF document text
    • https://cdn.sqhk.co/pesarukogi/Taid9hj/xadiwubasivizatakiz.pdfIn PDF document text
    • http://mejumafegebameg.mygamesonline.org/52333005591.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/acca_f1_kaplan_exam_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/hvtRCjj/jowakodaxurekelezevupulug.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/canon_eos_rebel_t5i_manual_settings.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/fixarobu_genumovovimukeg_gugonulani_palofakup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firiveperoju.epizy.com/descargar_acapella_maker_premium_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc99928-349d-4fb2-8892-0369a9a7bbfa/revaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf354955-3c90-4d3b-8f9f-a08ae2b05e62/guderigimuxubexisa.pdfIn PDF document text
    • http://devuzobek.rf.gd/radio_bodor_sunda_cangehgar.pdfIn PDF document text
    • http://pagikojezokatu.rf.gd/gewamimobomus.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_8108363674f44dd9a7907a6bda9d27f7.pdf?index=trueIn PDF document text
    • http://wokidomogu.onlinewebshop.net/jubusigilapikugaweva.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_ef032a3b76734281a71157d7cb762149.pdf?index=trueIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_abb1594bd78245b2a863558044edabde.pdf?index=trueIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_bf6c0c19648945e9abec1782159d8376.pdf?index=trueIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_e65b0c9f219241c1a48ccc5549b5ed7f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC8 5600 bytes
SHA-256: d3200c9006c38cdd797bfaca135c1640dab78a8c75403b2226946cdb43c10e01
font_01_sfnt_off000110c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C4 12836 bytes
SHA-256: bd283e20ab968050f6da2c1805bc66a3c5b1ab48b18573593a90fdc5cbae0080

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