Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33a26d12ffa69fe…

MALICIOUS

PDF

71.6 KB Created: 2021-03-27 10:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 79d7510cb34398faa0801fc006fc38d0 SHA-1: ddf049f627875a9fd1a8b1aa664f6ebdf17e6167 SHA-256: c33a26d12ffa69fe6fae12303518bc28e2d78102d32476ee06740dcc1c2d5bee
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 0.9992

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://soxebez.ru/123?utm_term=baileys+caramel+nutritional+information PDF link annotation
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/kevurasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_6019ddbf25e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_6056900ee98a2.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/Lgjhb1W/64513177818.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/giNaCja/miui_10_launcher_app_drawer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475738/normal_604f568e14e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_601f859ab2f47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366401/normal_5ff26d08b391d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_5fd6000335bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/Hbmhfhc/cramped_up_stomach.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_6013ba04e4e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_603d80533d3eb.pdfIn PDF document text
    • https://cdn.sqhk.co/mixasuwekov/hqkjfu8/horror_ghost_sounds_mp3_free_download.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/9673563.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/how_to_make_kundali_from_date_of_birth_in_hindi.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_d3c30045370b4c5b8ac4e31b0d07dc41.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_93f7b946ecdd48648778ade5cf7a242e.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_f0c9c4ec59cb4f3285d52add5f829ce9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/hand_in_notice_letter_template.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_651f4374de604b2ebce41b853334c7b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/fukosonenomebokom.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/teguvoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/67109597149.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_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 5180 bytes
SHA-256: 0f6d0626b3b5fdb5a9cc5ad6aab6bb620e7a0406acc3047cdf43762fe1437d69
font_01_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 11752 bytes
SHA-256: ede5b36545e232ca81cc03549d0a49464fe92d7ceb62303ad3a30de46ddd5675

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