Malicious PDF — malware analysis report

Static analysis result for SHA-256 176097fa316a7ac4…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 15:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 794b4612c2ae556234ed98f7f5dbacf3 SHA-1: f4ff687db727e0e37ea5ebdf53a33a2eb3b6e813 SHA-256: 176097fa316a7ac4b7b202498d7d43d03efeb894b0a48d0bdd0c8fdf8b515183
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. A PDF heuristic indicates an external URI pointing to 'https://nipisod.ru/strik?utm_term=la+diferencia+entre+animales+y+los+humanos', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=la+diferencia+entre+animales+y+los+humanos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413703/normal_6036c63da5393.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/fNjaBic/depoxibenemoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/jfgeggU/the_space_between_the_lines_2019_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_60348f65e875b.pdfIn PDF document text
    • http://eroganoficial.site/jegedefkg42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_60109e5933183.pdfIn PDF document text
    • http://interplast.ru/26778423511pbpmw.pdfIn PDF document text
    • http://apelsins.space/electronics_for_dummies_3rd_edition_download4t8s0.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/zwtjjmw/78506788299.pdfIn PDF document text
    • http://rutiputi.22web.org/salaxumiveraxuwedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/delivery_challan_format_in_gst_act.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/navy_eval_writer_book.pdfIn PDF document text
    • http://xejojud.epizy.com/42376819834.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/62182395423.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_to_sync_soundpeats_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/zajofatopotu.pdfIn PDF document text
    • http://dululelafekupas.rf.gd/44841947206.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/indefinite_pronouns_worksheet_grade_4.pdfIn PDF document text
    • http://fezuveguxala.epizy.com/56962338056.pdfIn PDF document text
    • http://kaforezut.epizy.com/apologia_pro_vita_sua_espaol.pdfIn PDF document text
    • http://pugobafujopelat.epizy.com/34351634330.pdfIn PDF document text
    • http://fujegite.rf.gd/3666980986.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_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 5304 bytes
SHA-256: d5296592b34055dbee13a6570291daa588d01f0b702ea0346a225f222528633c
font_01_sfnt_off000108c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C9 12276 bytes
SHA-256: 85dcf5f4fb491e5ab59b9410b5c12dcfc0d24cb5c6bf2f520efab1fc4f62b1f4

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