Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d914a6b32165d10…

MALICIOUS

PDF

84.4 KB Created: 2021-03-02 00:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a0f7004d5233de4972ce541661e86e21 SHA-1: 3afcd02d4a6c4f0ca6fc1af6392640055b69488f SHA-256: 0d914a6b32165d10c78c2dcb9bb75775a22278b8e760c5c6337d51750313e7d4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and the ML_NYX_PDF_MALICIOUS classification. The ClamAV detection further confirms its malicious nature. The embedded URL and the PDF structure suggest an attempt to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=theory+of+relativity+musical+cast PDF link annotation
    • https://cdn.sqhk.co/filodomazora/6jWqFge/pudidog.pdfIn PDF document text
    • https://jixerunoxeza.weebly.com/uploads/1/3/4/6/134678785/99b4f7f3.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/dYjjiih/ding_dong_deli_nj.pdfIn PDF document text
    • http://wejedakipitag.iblogger.org/mewejanizadodenewupimafun.pdfIn PDF document text
    • https://cdn.sqhk.co/zaroriko/oIijgej/luxovagipatuvod.pdfIn PDF document text
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/9413041.pdfIn PDF document text
    • http://sozadulowen.22web.org/formel_1_sky_2019_moderatoren.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/iukjagh/pagipidirusajafo.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/sisaxu/certificates_of_completion_free_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/mp4_video_to_audio_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/one_punch_man_anime_and_manga_differences.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/what_bible_to_use_for_journaling.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/11512345617.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/fapobusarogi.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/sword_coast_backgrounds.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/38515141212.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/linifigagajeg.pdfIn PDF document text
    • http://xalatirasu.rf.gd/evidence_of_evolution_quiz_answer_key.pdfIn PDF document text
    • http://vudalulok.rf.gd/hernia_interna_abdominal.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/how_to_backup_pc_with_wd_my_passport.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_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 5232 bytes
SHA-256: 14d5043ced39253af39a5b3d4566503689f5531f950e6f4cde902ad2115317b2
font_01_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 11276 bytes
SHA-256: cf72422f8ef02c5b968344322dc907a4c3a9af63de1e247dc8595e50e3862d33

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