Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2db5e17fcdd9dd2…

MALICIOUS

PDF

75.0 KB Created: 2021-06-02 09:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03f983a9489e47ae43d9af2d3f88ca3f SHA-1: 2894b8d05e6e20225db6a185b29b5d0733b7a136 SHA-256: e2db5e17fcdd9dd2aa945f98bbfa388da7f04012b942260c0eeed149deb2a8f0
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=storyboard+template+for+indesign PDF link annotation
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/def2a771c26d7cb.pdfIn PDF document text
    • https://wakutoji.weebly.com/uploads/1/3/4/3/134314583/medokerugale.pdfIn PDF document text
    • https://pesakagikojeli.weebly.com/uploads/1/3/4/6/134690263/xivodopugifib-tenomofisuz-givamegon.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/giteke-risepa.pdfIn PDF document text
    • https://lifigosup.weebly.com/uploads/1/3/4/8/134884960/sewafabakuronapifu.pdfIn PDF document text
    • https://niladomawinur.weebly.com/uploads/1/3/4/8/134875702/4546322.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/gimulijog_wiruboxabitu_denel.pdfIn PDF document text
    • https://pajopujo.weebly.com/uploads/1/3/4/3/134305169/gadagosopixowedolis.pdfIn PDF document text
    • https://koligopore.weebly.com/uploads/1/3/4/6/134605833/lakiwure.pdfIn PDF document text
    • https://polafepunulud.weebly.com/uploads/1/3/4/7/134718340/2766124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiletejude.pbworks.com/f/how_to_prepare_daily_work_report_in_excel_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2b2b77-dedd-4030-8b5a-c25358932125/jisoratisuluwapogipudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead5712e-3517-4399-9bbb-7a3ac305c9c5/profusion_1500_watt_heater_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60939131-c90f-4632-9242-43185b9e8c8f/navy_fitrep_fillable_form.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/kabhi_kabhi_film_songs_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe8aff2-2456-4536-8ed9-8be095315a57/juxugejiwuvevemuzisipal.pdfIn PDF document text
    • http://risoxef.pbworks.com/f/bezosejixobevuwelep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb129b4-8ea1-4a08-af96-0e216aca2f7a/which_eclipse_ide_is_best_for_android_development.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/92190682889.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/48233333068.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144424740/53305463463.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144481356/bleach_vs_naruto_3.3_unblocked_games_66.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 5704 bytes
SHA-256: b48be066262414684d8190da3a04f4d53d6cc87b997322ef71eba529c552ccc2
font_01_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 11008 bytes
SHA-256: af73e6fff72d41ff053373eaae88f51d3f510308284db1a6150b4a299ef36397