Malicious PDF — malware analysis report

Static analysis result for SHA-256 561a72bc39563a3e…

MALICIOUS

PDF

75.9 KB Created: 2021-05-16 13:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f5c24bc3dd5abc9c4547aafef218f867 SHA-1: ece259b4d48d0f019c1af65d5ff2eda59768a6dd SHA-256: 561a72bc39563a3eff75609626af698487b5f8fc122052fb1d1faaa1807da5d1
126 Risk Score

Malware Insights

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

The PDF file 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 phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=what%20is%20the%20latest%20dragon%20ball%20super%20manga%20chapter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcca6b3009cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_602980954ff02.pdfIn PDF document text
    • http://uscarins.info/do_vizio_tvs_have_optical_audio_outask5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fd3d17d754c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_6067a5fc5983c.pdfIn PDF document text
    • http://bestsaleshopin.xyz/50_mile_ultra_running_planst4er.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/c1962168-49a6-4e9a-a322-256a984fb321/george_odian_principles_of_polymerization_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/project_definition_document_template_prince2.pdfIn PDF document text
    • http://guvewenif.epizy.com/what_kind_of_oil_does_ford_focus_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6665997-ede0-4a1d-bdcc-f342f91d69b9/dudowatuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38642b01-14b4-4ba2-a168-b16d8128ba52/woxoduvopuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2304eb0-921c-47d7-ace1-f20996dde81b/33326577354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab48130f-7001-4232-bdac-b26edc042da0/sinudepiladakivivo.pdfIn PDF document text
    • http://vuwonipaw.rf.gd/42780641783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754b158e-acbb-4746-a675-7a644659681b/giwuzerezadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774183fd-ef6d-4b3d-a18c-c6a539f973f8/gadoxofusezajolukawemor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961203c0-5b28-4a6b-889b-d7d6027ded1e/99771158596.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/59628970878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e0f7a8-afa0-41df-ae8a-93d7e2f8d94b/continuidad_de_los_parques_resumen.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_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 5640 bytes
SHA-256: 447010a45f9a46ee9bd60edfd535926ca6366e9103530a0487637194981532f1
font_01_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 11324 bytes
SHA-256: ed2f8827ab5be9c4e4095ab6eaf0d8657f6988ec35ec45190e9d2595a2cd44f1

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