Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3953cb3e46ecb1…

MALICIOUS

PDF

117.1 KB Created: 2021-04-09 11:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 24b6b030922c58e582a97ac99ccfde49 SHA-1: b03f0caf00332c24bfe67dedcb85513dd9efcd34 SHA-256: 9b3953cb3e46ecb10da105f1b1e1f2d69ed68a5359784cf83933107b0dc69b50
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to entice users to click the malicious links. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=midland+gxt1000vp4+36-mile+50-channel+frs%252Fgmrs+two-way+radio+set In PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/fefoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528915/normal_6000a1505d36b.pdfIn PDF document text
    • https://cdn.sqhk.co/mebosuxular/idIyigL/truck_driving_games_free_download_for_windows_10.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/e8a28188c20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_6035d920622c1.pdfIn PDF document text
    • http://diniguwoweka.iblogger.org/billboard_psd_template.pdfIn PDF document text
    • http://folovavizenemi.22web.org/4934618643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5feda30547572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389355/normal_5ff953f95889a.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/7098475.pdfIn PDF document text
    • http://jufidozotazi.66ghz.com/66163082141.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/9998257.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/ijopFgc/growtopia_harvest_fest_2016.pdfIn PDF document text
    • https://delupizamima.weebly.com/uploads/1/3/4/5/134578079/846567f35035623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_6043b38d853f9.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/ielegfz/lovexej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5feaf2d0ed934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzatefiroko.epizy.com/across_the_universe_full_movie_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a4d0d3-e042-40cf-974c-50c27edee58e/95446605233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa57300-8ddf-4990-af53-6b3729a3fd1b/how_to_solve_a_rubix_cube_in_2_moves_tiktok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a49cc4b-1b3b-4de1-bf8b-0101842b0b64/briggs_and_stratton_450_series_148cc_carburettor_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80c41de-4d2b-4e50-84b7-46b8703b3c9a/sig_sauer_p226_bb_gun_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fde1b11-37ac-4170-952d-048ca9856202/muredo.pdfIn PDF document text
    • http://mewoxulo.epizy.com/science_9_learner_s_module_answer_key.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_off000184e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E7 6688 bytes
SHA-256: 814aff0b33b4adc82898483168a744bcd105e1a48dcdb157a5191e5c8a806efa
font_01_sfnt_off00019bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC5 11928 bytes
SHA-256: 3572aa60ac897b3c7d9329b7b4b05efc11f068476baa5e1ed71bb944e5fbb033