Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ff117a4f94da79…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 09:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ca4e59f5032794cff07532963a8db19d SHA-1: c42cf878f7930456d9ecdc99ceda3703e87460da SHA-256: 36ff117a4f94da799576008262d133ad3c9941b1f19f313ea2f54a8c6304e5af
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the presence of external links and the heuristic firings suggest the document is designed to redirect users to malicious content.

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
  • 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://mezovuduw.ru/strik?utm_term=maxi+cosi+pria+85+max+convertible+car+seat+nomad+blue PDF link annotation
    • http://cadenalia.com/bilekuxelekawudclmf.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/synonyms_and_antonyms_worksheets_grade_63tgjr.pdfIn PDF document text
    • http://stankovit.ru/polizuzajilerabuzotxg1.pdfIn PDF document text
    • http://wukosuwusa.iblogger.org/instagram_videos_online_free.pdfIn PDF document text
    • http://kaverijamawe.iblogger.org/80546537206.pdfIn PDF document text
    • http://pycnidwzxc.info/99704661333p28oc.pdfIn PDF document text
    • http://zozoriba.iblogger.org/average_emergency_medicine_physician_salary.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/29450105105xgz3h.pdfIn PDF document text
    • http://goldstein.capital/system_analysis_and_design_quiz68768.pdfIn PDF document text
    • http://natlegend.space/pool_of_radiance_walkthroughqjmfa.pdfIn PDF document text
    • http://stixlife.info/georgia_drivers_license_test_questions_and_answers9ykbw.pdfIn PDF document text
    • http://moscowflowers.online/96083339887nj6qk.pdfIn PDF document text
    • http://garderob-podolsk.ru/69662469312d8xf1.pdfIn PDF document text
    • http://outputqwvk.space/mejefamiwarikekis05i3e.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/55a97a5a-b28f-4fa4-88e2-16893c434fe6/sokajofiwiviwudixigalaro.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/98869857545.pdfIn PDF document text
    • http://nataxos.epizy.com/jquery_ajax_tutorial.pdfIn PDF document text
    • http://didajuna.rf.gd/free_email_signature_templates_outlook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db65fd91-eb02-4d8a-89e2-e11374dc3fcb/fonikira.pdfIn PDF document text
    • http://muporomeg.rf.gd/xipipimerukakowusatunup.pdfIn PDF document text
    • http://waxozex.epizy.com/anjali_anjali_pushpanjali_telugu_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42d6c4d-9181-4fa0-807f-32964afbf176/xaboz.pdfIn PDF document text
    • http://divojeniro.epizy.com/12120646869.pdfIn PDF document text
    • http://kirebidinuj.rf.gd/minn_kota_riptide_55_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bf30da-0f3d-4034-8762-932e319a5916/migeletujajame.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_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 5808 bytes
SHA-256: 1e172cb0943dfea1689c623a5e58859f8bd0b4054f4c3be81d52011c925baaf7
font_01_sfnt_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 10988 bytes
SHA-256: 5d6695ce2d76d83efa04427f6dce1203b49837d435fd0db11a872ee8ae1cb183

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