Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c26eff18fe90aa3…

MALICIOUS

PDF

76.9 KB Created: 2021-04-18 10:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b293212e818a73ab40e95459bd711143 SHA-1: 0adc91fee935e47bd9ce9de489d929e7127bebab SHA-256: 5c26eff18fe90aa34e2f650f254042916d6e09872516d65b56f70183056f28dc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=famous+examples+of+straw+man+fallacy PDF link annotation
    • https://cdn.sqhk.co/dewufidabo/lPJMibd/57447086035.pdfIn PDF document text
    • http://tigimurudel.22web.org/sutoloz.pdfIn PDF document text
    • http://raisinslabs.club/79552717307jnhyf.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/mSYTjdu/radiant_cut_diamond_engagement_ring_with_halo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonaruvipiti/ggQgdhb/botugorepenatugudageba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fe3987539a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_602bb4d38c65c.pdfIn PDF document text
    • http://vuwusud.iblogger.org/que_contiene_fluoruro_de_sodio.pdfIn PDF document text
    • http://kufukoxeb.22web.org/dadin.pdfIn PDF document text
    • https://cdn.sqhk.co/givefugonuw/pgjZVcD/kidodeporixanos.pdfIn PDF document text
    • http://circulshtangcalip.website/lean_startup_vs_business_model_canvascihww.pdfIn PDF document text
    • http://uscreditinquiry.info/5082617018cc3pg.pdfIn PDF document text
    • http://kihepc.xyz/10935150759k88nt.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/fisame.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/hib5Wsq/xezirizagok.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/40k_codex_download.pdfIn PDF document text
    • http://checkmycredit.info/block_ads_on_android_deviceqqb17.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/8f850fdc-2957-4fe7-8c5c-35814a1eb8da/cisco_networking_interview_questions_and_answers_free_download.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/mumeboxusufejedativurogez.pdfIn PDF document text
    • http://zowomazo.epizy.com/sample_analytical_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465861c8-fbb4-4779-b3eb-a384750b9e73/marbury_vs_madison_key_points.pdfIn PDF document text
    • http://zusapogadakafa.rf.gd/receptors_agonists_and_antagonists.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_off0000ef21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 5376 bytes
SHA-256: 394cfb2a068544243178c06a41d6d36d39cd815f554be07e044c494ed552a847
font_01_sfnt_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 10664 bytes
SHA-256: 64dae6570235e93a936d85de2fea1b38a9e6453bfcc9c4f7a6a8316a442a4fdc

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