Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f32554e6af3f35c…

MALICIOUS

PDF

82.8 KB Created: 2021-06-01 17:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 22b030f1d10f7732519ac62bd2deaaf3 SHA-1: b09834aec4f3536a209934b29603ba2d76e2e0df SHA-256: 4f32554e6af3f35c809c02e2ff38f5abb98c37f5aad4cd0af384b4e201bc097b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://allytemp.ru/pbw?utm_term=fiche+de+lecture+l%2527%25C3%25A9cole+des+femmes PDF link annotation
    • https://xojurumute.weebly.com/uploads/1/3/5/3/135328527/a77ec6b75d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_601b88e21a58c.pdfIn PDF document text
    • https://jemusutagutuf.weebly.com/uploads/1/3/5/3/135390091/wamurosuji-nokopaxarom.pdfIn PDF document text
    • https://fizegebukuri.weebly.com/uploads/1/3/1/4/131453213/givudalum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_605568535bce8.pdfIn PDF document text
    • https://tobedetileva.weebly.com/uploads/1/3/5/3/135337372/dubitibilegewu-bivuxogew-selulunugafa.pdfIn PDF document text
    • https://zafaketikeduve.weebly.com/uploads/1/3/4/7/134704309/14345.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/263fe6159.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367622/normal_5fcafbbbeaaaf.pdfIn PDF document text
    • https://nebegoxo.weebly.com/uploads/1/3/4/6/134638594/3bf487d9.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/60e2ee8f-7182-4013-8cba-9318305dcee0/zubolarom.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/jebumebofa.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144422310/chinese_character_writing_practice_book.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144423747/roropafifawokubawowoxi.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/herbalife_30_day_challenge_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa79c257-a47a-4342-90b8-b69b5ccace39/descargar_chameleon_run_apk_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42e87ce-06a9-4146-9cb7-c48edf01570d/corel_draw_x7_portable_free_download_full_version.pdfIn PDF document text
    • http://xofitesu.pbworks.com/f/sample_cover_letter_for_uk_visit_visa.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/xowotoxunipavejig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c66cb6-7ec6-481e-a7ec-e8ad453fa4f4/23645732702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655a9c8f-a0ac-4610-890f-fc9885a28aa5/bixabobip.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/78613616211.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144422676/6244586508.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_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 5184 bytes
SHA-256: 2639ee5ec4a3b5bc28dc97471c32540c3d883c387cfebd5cde6ed0e0166588b3
font_01_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 12744 bytes
SHA-256: 193e0c1b96a1ff86847b75dbc5506c2b6de972ca4c9c591e1de74494809d309e

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