Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a71592640a769a…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 17:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4309e0b76079c449f69f52e6b1dbad30 SHA-1: ee48444b2276172102d2fa17716129446cc6a9b0 SHA-256: e6a71592640a769a3398a3e5342653e4481bd4a7d05cdee16f8ba9c4ed279cdd
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links, which are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+to+draw+a+graph+in+science+ks3 PDF link annotation
    • http://terugate.mypressonline.com/bright_angel_trail_map.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/sta-rite_pool_heater_troubleshooting_e05.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/ihdicMy/7698903608.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/kusegesojugamuranuzal.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/agarbatti_business_plan.pdfIn PDF document text
    • https://dizewipukuride.weebly.com/uploads/1/3/4/6/134615497/pogazipulerap.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/JGgfpif/tijabomepenifun.pdfIn PDF document text
    • http://sazulido.medianewsonline.com/91656166605.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/sizewefo.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/fim_score_sheet.pdfIn PDF document text
    • https://wedikeme.weebly.com/uploads/1/3/1/6/131606111/zapajage.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/fojubijipigopasina.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/5ij4hf1/cnc_machinist_jobs_in_st_paul_mn.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/gumidek.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/bojolasigol.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/cardiogenic_shock_management.pdfIn PDF document text
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/tovujikukilazof-wagefenifif-lixegepiroxim-lopumosobodo.pdfIn PDF document text
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/efcc41b37de.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/how_much_is_premier_protein_at_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/how_to_remove_printhead_from_pixma_mx922.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_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 5584 bytes
SHA-256: 491bcd967f280dbe7df5cc147090571ad37aa1029291a2de0a26855c3d9e3631
font_01_sfnt_off000108eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EB 10828 bytes
SHA-256: 2919ac124136e5ab591a669101ab58c1959f33ebda084dc2738fa1cd22725913

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