Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed17bdcf59c20be9…

MALICIOUS

PDF

117.4 KB Created: 2021-03-15 07:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3b843cca3235cd6bbb42d9c78795109c SHA-1: f52fc1e1aabf2b4b35445c0528dda9f7bdeb8c4d SHA-256: ed17bdcf59c20be9696ee0cee1efa139da41b1f7b7284012af9179eb8c016344
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to known malicious or disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=the+fountainhead+summary+pdf In PDF document text
    • http://sport-stavki.fun/cyperaceae_family6feap.pdfIn PDF document text
    • http://zelopaqq.xyz/my_cloud_home_pc_backuppwmfx.pdfIn PDF document text
    • https://datodorigagage.weebly.com/uploads/1/3/4/6/134697486/8140557.pdfIn PDF document text
    • http://instapodarok.site/wings_retro_5_jordansfjrtn.pdfIn PDF document text
    • http://amin-ukraine.net/a_uma_dada_temperatura_2_mol_de_h2gfadu.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/G1jfcom/34474564684.pdfIn PDF document text
    • http://sunmarkt.ru/fl_studio_12_beat_tutorial_for_beginners04fdr.pdfIn PDF document text
    • http://jelesanu.iblogger.org/whatsapp_messenger_for_tizen_version.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/457577.pdfIn PDF document text
    • https://cdn.sqhk.co/luwosera/jebjfpU/42473925966.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/kitutunekunax.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/jjYs7ic/35176424504.pdfIn PDF document text
    • http://dezlice.ru/eo3_skill_simiwz3x.pdfIn PDF document text
    • http://dopepaba.iblogger.org/1134225373.pdfIn PDF document text
    • http://dimax-matrasy.ru/vixetilapufudwuj16.pdfIn PDF document text
    • http://noncomform.space/wuguxaril3zbed.pdfIn PDF document text
    • https://jowajasodosetu.weebly.com/uploads/1/3/4/3/134308851/dusoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/jggjiia/viruni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/related_work_in_project_report_example.pdfIn PDF document text
    • http://zotebetusapi.rf.gd/4143812325.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/christmas_food_shopping_list_template_excel.pdfIn PDF document text
    • http://povagemu.rf.gd/auth0_android_refresh_token.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_off00018cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CBC 5300 bytes
SHA-256: 35819ae9966f958a386209363280907e1739309ee0578abcbe8ca9382d610cba
font_01_sfnt_off00019ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EA3 12016 bytes
SHA-256: 06adf56909b2f9bbe65f63058cd73ea5ab067a17389373a62740d654f60cfba6

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