Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cfd592b49ecb58…

MALICIOUS

PDF

83.0 KB Created: 2021-03-20 13:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c863d19d590176c7c67005d7362eff2e SHA-1: 5e0ef571019f029c0b1c1b95bd58836753fa698c SHA-256: 94cfd592b49ecb5879fa0fcbb594f5288efc6ed9869bfc002eaf6086b749040e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links pointing to disposable domains, characteristic of a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content or facilitate SEO manipulation. The presence of numerous external links and the ML detection strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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.
  • 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://dugedepap.ru/wix?keyword=justice+league+dark+comic+free+online PDF link annotation
    • http://cmb-accueil.com/root_words_worksheet_grade_7y6cxz.pdfIn PDF document text
    • https://sajinekud.weebly.com/uploads/1/3/5/3/135391411/nebikebev.pdfIn PDF document text
    • http://runmasten.online/habit_7_sharpen_the_saw_activitiesa5njj.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/sedumi.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/lekosudo.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/8784721.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/4184265.pdfIn PDF document text
    • https://zugogulubituwo.weebly.com/uploads/1/3/4/2/134266111/gagojamekijoxe.pdfIn PDF document text
    • http://copyright-help-report.com/xakamasetujun9z2jn.pdfIn PDF document text
    • http://nasty666.space/apache_beam_cloud_sql4rhmt.pdfIn PDF document text
    • http://dragonflysagewellness.com/38686727368beqod.pdfIn PDF document text
    • http://hamlikjorettoop.ru/weil_mclain_boiler_e_18_error_codeedjgk.pdfIn PDF document text
    • http://fakts.design/what_is_the_cpt_code_for_eye_testq4pms.pdfIn PDF document text
    • http://cenderaoriginator.com/how_to_hard_reset_nook_coloruzay7.pdfIn PDF document text
    • http://gexulogoben.sportsontheweb.net/dezonuxiselet.pdfIn PDF document text
    • http://trackengine.host/78556496893z9otm.pdfIn PDF document text
    • http://lg-copyright.com/dominos_pizza_australia_voucher_codesg963i.pdfIn PDF document text
    • https://vubufixul.weebly.com/uploads/1/3/4/7/134708570/767098b2438.pdfIn PDF document text
    • http://balifruit.com/dd_monsters_5ew0wws.pdfIn PDF document text
    • http://nadahul.ru/29851176623d300t.pdfIn PDF document text
    • http://copalofa.site/340560469232n6jb.pdfIn PDF document text
    • https://titoduxelet.weebly.com/uploads/1/3/5/3/135399046/fatunigulanivigofa.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/tom_clancy_ghost_recon_breakpoint_update_1.14.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/papafinod.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/5300073.pdfIn PDF document text
    • http://blacklaser.ru/zofurezo3sms4.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/kudozomowuzor-zegogaw-kimeboxo-vejunifa.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/91607571057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nobapizasiwe.myartsonline.com/13396059469.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_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 5396 bytes
SHA-256: f7d76aa3c52b4d2cfd5087ff63443b87cbf27e919705f3629680d11eb134997e
font_01_sfnt_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 11988 bytes
SHA-256: c367e70edb8fd3470661f50d96fa5eb2affbb3ca70956019d73f7f419c617006
font_02_sfnt_off00012704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12704 16164 bytes
SHA-256: 1f773c7a7450f03bde076cc55d70989549729bf7b3b780ce5eaadefca762edb6

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