Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb7ddd7ac2111eb…

MALICIOUS

PDF

73.7 KB Created: 2021-03-03 19:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4d132ce28b32e317d68c83afebc7e230 SHA-1: 0589fb487ae87c0d61eece8616cfa08db4d5f6d9 SHA-256: 1eb7ddd7ac2111ebdb2669d91224d11be15196b3f2805c5ab7778fca4c15a32e
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious redirectors and disposable hosting, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=yum+food+safety+standard+pdf In PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/hajVhjI/today_s_weather_forecast_for_houston_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/dIjhBjc/37179269904.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/cEhcbfj/radsone_hi-_res_player_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd636fb4d4e9.pdfIn PDF document text
    • https://dewosuto.weebly.com/uploads/1/3/1/4/131453399/6690284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5ff685b4811b8.pdfIn PDF document text
    • http://merovew.xyz/black_friday_tv_deals_uk_43_inchixq4a.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/5d148391.pdfIn PDF document text
    • https://lazogipinu.weebly.com/uploads/1/3/1/0/131069887/zumukexaligojizemom.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/sezilelemaw.pdfIn PDF document text
    • http://kiwedoro.66ghz.com/best_online_converter_to_jpg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_60357f7d76720.pdfIn PDF document text
    • http://sparzha.club/dowanewugopuxegetalj5oq.pdfIn PDF document text
    • http://zoneeuro.pro/vazukonuseterifufuum45y.pdfIn PDF document text
    • http://phtech.site/86503834871f9h8i.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/disati.pdfIn PDF document text
    • http://gedoviduge.iblogger.org/excel_vba_unprotect_all_sheets_without_password.pdfIn PDF document text
    • http://gifozuxozud.22web.org/vepedarutigixagazali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422906/normal_5ff8c522e4668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiboxinazelode.rf.gd/85978837453.pdfIn PDF document text
    • http://rokosarod.rf.gd/chrome_browser_app_free.pdfIn PDF document text
    • https://medlineplus.gov/foodsafety.htmlIn 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_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5220 bytes
SHA-256: 684fda21d66d3eaaf6dd196881696a5773f08e13905c54e11241bdea0d5c0bfb
font_01_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 10904 bytes
SHA-256: 14599206499b7cc4dc853bbbffd1d985373a4b6f8396097c39774e2a106f726e

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