Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2743d77a78d460e…

MALICIOUS

PDF

97.2 KB Created: 2021-03-14 04:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a54f9044d91cc1f70f3faafd1033f55f SHA-1: 5ca1995a4f348934a0ff23ddcc9219bbe95ecfc3 SHA-256: e2743d77a78d460ee319efa215f68e66aeda82abefcc18eee101de8ed9ffaf8a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xezojetit.ru/award?keyword=trigeminal+neuralgia+treatment+pdf PDF link annotation
    • https://cdn.sqhk.co/suwajipox/geMijia/venek.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jeUciiH/jumanji_epic_run_mod_apk_1._0_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/hfiiaz6/capital_fund_1_online_payment.pdfIn PDF document text
    • https://cdn.sqhk.co/vutenugade/ggjgfV8/numixufut.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/wevoliperofaduvuvele.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/zgghbp2/brain_ball_for_dogs.pdfIn PDF document text
    • https://rekaxarekarefov.weebly.com/uploads/1/3/5/3/135300852/ruweped.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423772/normal_6000b8af4e294.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/aJzjgaF/mevowuxape.pdfIn PDF document text
    • https://zububeto.weebly.com/uploads/1/3/6/0/136082076/kigogubakalozor.pdfIn PDF document text
    • https://rivirabuxi.weebly.com/uploads/1/3/4/6/134699302/2463606.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/jjb5JVX/synchrony_bank_cd_rates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5fc74c08cba97.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/ghJ2hoq/sniper_movies_list.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/vukine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_5c295a6a56c54695b5842e73eaa74470.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_23ce54918da44bd1bd093c1aea9c6c86.pdf?index=trueIn PDF document text
    • http://xediguvodolej.epizy.com/actor_karthik_hit_songs_free.pdfIn PDF document text
    • http://webixulibuka.rf.gd/36041976020.pdfIn PDF document text
    • http://sivakekixil.epizy.com/grainger_catalogue_free.pdfIn PDF document text
    • http://fereralud.epizy.com/kennewick_police_arrest_reports.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_eff84bbbd2a9425cb69a95b1e3f10d07.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED9 5132 bytes
SHA-256: 13d18413d17b37df66676a7e7d9187706aa703b528ae2d8c562e8b3e9b81bb1b
font_01_sfnt_off0001503a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503A 11420 bytes
SHA-256: 0cbb5d139e30c256d132af7a8b8a18827599bbafb471c639736e8421d58e4494