Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4a7d5a8c2ddc1f…

MALICIOUS

PDF

79.2 KB Created: 2021-04-03 14:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 09ed452892fb8e8adaec1c8199c1a7c6 SHA-1: e5b25eec0c70e5341acd373a0713593fbbb7150e SHA-256: 0b4a7d5a8c2ddc1fab99c77caa944395a11d70496994fbd7acc550daabaf498b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=real+life+area+of+composite+figures+worksheet+answers PDF link annotation
    • https://bobugebajagon.weebly.com/uploads/1/3/4/6/134682349/d621e90a.pdfIn PDF document text
    • http://tapadobav.iblogger.org/roreg.pdfIn PDF document text
    • http://shop-profildoors.ru/what_is_a_diversity_statement_for_a_job_applicationa4h17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_6058ff0bc8c93.pdfIn PDF document text
    • http://sokolov.fun/merck_chloroform_coag6u3y.pdfIn PDF document text
    • https://lanufuxag.weebly.com/uploads/1/3/0/9/130969896/9467133.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/gj9ijIJ/unicorn_photography_pinterest.pdfIn PDF document text
    • http://astrohelp.space/die_together_songwwdsq.pdfIn PDF document text
    • http://fitit.space/study_in_scarlet_gutenbergyl3hq.pdfIn PDF document text
    • http://insta-sale.site/delonghi_magnifica_s_plus_review66en6.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/ia9Odia/oldies_music_70_80_90.pdfIn PDF document text
    • http://famekeletiti.iblogger.org/frases_del_principito_y_la_rosa_en_frances.pdfIn PDF document text
    • http://helpverifedbadges.com/72609417514dl7nu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457592/normal_5ff5bfb0e1905.pdfIn PDF document text
    • http://maturibcgj.space/how_to_size_a_start_capacitor_for_a_compressor6o2yg.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/chfZ33c/pifavo.pdfIn PDF document text
    • http://wowitaly.pro/wijopuvezofajakog3myjd.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/virij.pdfIn PDF document text
    • https://cdn.sqhk.co/kovutego/fhjaibn/applied_energistics_2_crafting_guide.pdfIn PDF document text
    • http://formverifiedbadge.com/sezezeduvolaxatesawasuwawn3cve.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/Kicjaij/541340439.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvaxazalafes.epizy.com/fojebasodile.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 5592 bytes
SHA-256: afa7d9ed6955b30c64f6cf6725cf1a56efd0571c215a7a74ed42e0af3a0dceea
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 11304 bytes
SHA-256: 1a3b804dc241c00e6729350d26dd2805c180b91a1f495aa91d1cd69eee9317d5
font_02_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 16136 bytes
SHA-256: 4060bc06df80a2d26420ddf8f1d02e4f8f8ebdcce0ae7d6a8faf4538740ad24e