Malicious PDF — malware analysis report

Static analysis result for SHA-256 630637e3ae4dbb75…

MALICIOUS

PDF

81.5 KB Created: 2021-03-19 11:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6bc65901399e236cd567e3fe4bebcc77 SHA-1: 4a7e869a0321d81583c493bd1efd623e380347b6 SHA-256: 630637e3ae4dbb753f37da7bb794f842cccf15685023995ab68e11d207047c9e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection attempt. Heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggest malicious intent. The presence of embedded JavaScript, though not fully detailed, further supports the likelihood of malicious activity such as payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/award?keyword=pulmonary+circulation+physiology+pdf PDF link annotation
    • http://lnstagramcopyrightmanagement.com/project_x_extended_cut_watch_onlineu129t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_601ba8659b275.pdfIn PDF document text
    • https://pegugigatusib.weebly.com/uploads/1/3/4/4/134460290/9710488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60354e21dca8f.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/45678728887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fd3c119363d5.pdfIn PDF document text
    • http://onlinetyz.xyz/piano_chords_chart_downloado9y0r.pdfIn PDF document text
    • http://dakuximakux.22web.org/78529943454.pdfIn PDF document text
    • http://blablablacar.online/how_to_draw_a_cartoon_dragon_step_by_stepvzdoo.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/pulunegi.pdfIn PDF document text
    • http://zinifezabi.iblogger.org/magni-_tech_industries_bhd_annual_report.pdfIn PDF document text
    • http://instapodarok.site/82055953771uhtkr.pdfIn PDF document text
    • http://konolux.medianewsonline.com/student_registration_form_template.pdfIn PDF document text
    • http://gagejunifux.22web.org/bepegoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fe71584b45bc.pdfIn PDF document text
    • http://smcjd.com/40054586602n69aj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nifusotajezunur.atwebpages.com/onn_dvd_player_remote_not_working.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_a1ffc7fb373e4dabbdd44711e263651f.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_6804ddf64e814cdc98d31b9d7f0f5e17.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_357a14db36dc41c4bb99e56b284ed7ac.pdf?index=trueIn PDF document text
    • http://tebafifara.rf.gd/31510238871.pdfIn PDF document text
    • http://jofanemapax.epizy.com/22330198108.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_65728c6b6b0b4a4da8cb30b61f943545.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_c33b1f27c0b54cd6bd90da471e585676.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 5436 bytes
SHA-256: ff0b6b1511aa07ee84ab86471f9095d62ee9f2fdd7a3ca0f13e98de6904f2e72
font_01_sfnt_off00010356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 10908 bytes
SHA-256: d7d18d1dc7478af71e86ab95179a2bc7fd666fd091806d55a1f13c2a45f5ee3f
font_02_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176