Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a575778e5c6007b…

MALICIOUS

PDF

68.7 KB Created: 2021-06-10 20:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aca0d8ce131f1d4d9effbaaf80029443 SHA-1: 8f6c3c32bdf91ae0df594c2acb4b3fde64323c26 SHA-256: 9a575778e5c6007b92e73eb24ff96c42d3ba9c5abaa021988fb86af4f1f6e9a7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://chcial.ru/pbw?utm_term=new+marathi+serial+ringtone+2020 PDF link annotation
    • https://siridadujaxata.weebly.com/uploads/1/3/0/9/130969300/rowegab_jaluw_lawukunulemesil_wurobi.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/zolubukilazixawegas.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/selevajivosaselege.pdfIn PDF document text
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/97a5c290e80.pdfIn PDF document text
    • https://wozexapumodokeb.weebly.com/uploads/1/3/0/7/130738903/sitoba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lomubel.pbworks.com/f/leredasin.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144814794/cellular_respiration_graphic_organizer_key.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144713280/lukujekoj.pdfIn PDF document text
    • http://mosutit.pbworks.com/f/saxon_math_algebra_2_answer_key.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/58874505175.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/proving_parallel_lines_cut_by_a_transversal_worksheet.pdfIn PDF document text
    • http://rezedul.pbworks.com/f/electrical_technology_by_bl_theraja_vol_1_download.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/f/school_of_dragons_gems_hack_pc.pdfIn PDF document text
    • http://jumogitakos.pbworks.com/f/free_download_chal_mera_putt_full_movie.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/w/file/fetch/144445059/pajojubumof.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/w/file/fetch/144687411/how_to_do_transcendental_meditation.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/w/file/fetch/144603006/sunolavifitorud.pdfIn PDF document text
    • http://kopiginawavu.pbworks.com/f/608324915.pdfIn PDF document text
    • http://bezagodo.pbworks.com/w/file/fetch/144667983/rurox.pdfIn PDF document text
    • http://pozapagula.pbworks.com/f/how_to_start_honda_gx160_compactor.pdfIn PDF document text
    • http://jasiduvegulu.pbworks.com/f/waralisaxuvipebafugazu.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_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 5436 bytes
SHA-256: 8239d762121ed02096f1f035c3ac243f49c29cf978aa615b26711a46187386d3
font_01_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 10428 bytes
SHA-256: db80b5db32b74aaf2c635a40f9a9b9b535e37b60a2f1b1052e7299fddd1651fe

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