Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f2019958e9b4f1…

MALICIOUS

PDF

82.3 KB Created: 2021-04-30 23:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5263397dc1e06eaf947f07b0fca7651f SHA-1: ec146b5b33a3b8ea7545767d42f4ca0fc8769e61 SHA-256: e5f2019958e9b4f183c5eccf5491e938d59f7990703c7023d313f191b391aaa3
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, likely serves as a lure, with the primary malicious action being the redirection to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=how+to+use+writing+style+on+cricut In PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/9851769.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/Asjciej/43879173453.pdfIn PDF document text
    • http://2220202.ru/graphic_designer_salary_nz_per_hourt614r.pdfIn PDF document text
    • http://gidpopiteru.com/munugezukamilumotuninameiydna.pdfIn PDF document text
    • https://gaxiliwila.weebly.com/uploads/1/3/1/3/131383945/xeliwilawur-sijosi.pdfIn PDF document text
    • http://setofexperience.site/152422639871tdd9.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hgupPhb/84715414988.pdfIn PDF document text
    • http://fresh-ita.space/best_carpentry_school_near_me9rkny.pdfIn PDF document text
    • http://hairsprof.ru/xujibadixejaziriketupevufqc39.pdfIn PDF document text
    • http://printnews.site/35450921334yx3z.pdfIn PDF document text
    • http://basiditdcf.space/luwuwozunemilazvdtwo.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/hbibaSn/96325099374.pdfIn PDF document text
    • https://dobuxavebixeli.weebly.com/uploads/1/3/4/7/134725246/985a9.pdfIn PDF document text
    • https://judaromoperojog.weebly.com/uploads/1/3/2/6/132681758/zivuwafufa.pdfIn PDF document text
    • http://dsv-trening.ru/cube_method_for_strongman_reviewf6lep.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/xusij_kutonijure_tavuvuratuligan_wazuparata.pdfIn PDF document text
    • http://ctuxuu.com/40691329021ktxsq.pdfIn PDF document text
    • http://itfamily.pro/notifi_elite_video_doorbell_installation_manualf50ni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/976b040a-43b6-44b9-a671-6c99ad57009f/wuxedisawukug.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/what_is_the_turning_point_of_fahrenheit_451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace3eb07-5e8c-43e6-8f1f-5a8756ec1d06/retokanifasifetogalikakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/12740160585.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/legend_of_the_rose_eagle_scout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63ae906-db93-47c7-af47-25e31ce5ba59/24132495351.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_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 4912 bytes
SHA-256: 9f68b77edc19b01e416d58e759aef3f6e8699b1ab965529b4d1cec7616f97614
font_01_sfnt_off000116a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A7 10860 bytes
SHA-256: 5bf7f50ed4c94aadd30958aaf2c91d508ac4229adf931ff397c8539430bcbbd1

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