Malicious PDF — malware analysis report

Static analysis result for SHA-256 6122a28f23d2b612…

MALICIOUS

PDF

98.5 KB Created: 2021-03-31 22:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e51da8137eba1f6409d7568934df739 SHA-1: 5e94a94b46248566b3b188914a5e5dc29918fce7 SHA-256: 6122a28f23d2b612af4fcfeaa43c185b916f0932a6af4abffadb37296b38fe88
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=sony+bravia+tv+manual+2005
    • https://cdn.sqhk.co/nigigeje/ghhbff8/cite_online_article_mla_format.pdf
    • https://cdn.sqhk.co/titesojijuko/aWmlijl/bwv_1006_piano.pdf
    • http://lnstagram-helps-contact.com/work_cited_mla_format_generatordrbi6.pdf
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/buritazuviwofi.pdf
    • http://razvivatel.blog/kazibexujqn664.pdf
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/59e3580789a.pdf
    • https://cdn.sqhk.co/gisatajofo/ihgiVi7/27208846074.pdf
    • https://jozegolufipiz.weebly.com/uploads/1/3/0/7/130776065/vivulusupiduteg.pdf
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/galikazizi.pdf
    • https://cdn.sqhk.co/gavoduse/iP1idid/ditopibowazux.pdf
    • https://cdn.sqhk.co/fuwasokeg/igCsvfe/94427698956.pdf
    • https://cdn.sqhk.co/nafumozuwe/ggfc1fR/lenovo_chromebook_charger.pdf
    • https://cdn.sqhk.co/zutijujes/dshahdq/miracle_berry_benefits.pdf
    • https://cdn.sqhk.co/kojariwirip/gaGicgh/metal_guns_fury_beat_em_up.pdf
    • https://cdn.sqhk.co/lijipatalenu/Eiha4zn/mivifizegixezita.pdf
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/fenewinoxikizob.pdf
    • http://lnstagram-blue-badge-form.com/dupexizixigiran9akks.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c39947f2-fafc-4fca-938d-6c31f989bece/jovefof.pdf
    • https://uploads.strikinglycdn.com/files/a876c5ca-6ae5-41e4-aaea-fb35046ed74f/88856534864.pdf
    • https://uploads.strikinglycdn.com/files/f6d8216b-961a-4250-9736-62ff7b8537aa/twenty_thousand_leagues_under_the_sea_oxford.pdf
    • https://uploads.strikinglycdn.com/files/e0fe7daf-10c0-491e-b50b-2d00cdcc2ac1/59351974388.pdf
    • https://uploads.strikinglycdn.com/files/e9fa62f1-d5e3-4cf3-b177-6f882d872c48/download_eragon_2_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/7ab3c4c9-240b-4e70-8949-e46911d77455/mozukamasavijozuke.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c31.bin
388c35c24f513e8d4f95a3e7f49ed8f14c21f8b0c966c4934a5ae179ebb18036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C31 5456 bytes
font_01_sfnt_off00014ebe.bin
89a640d7179a3572a83e7b951c527ba901b1b7c22584dd9425fde6dacca229b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBE 13892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.