Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49075f74cb73873…

MALICIOUS

PDF

105.4 KB Created: 2021-02-22 19:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e666681d08b49c79fcb27432a3ef9a90 SHA-1: 6a76775281b30deea3f4f28990273a277e2d0686 SHA-256: c49075f74cb73873cadf110bdbd624444c0cdc01b3e6fb54ad8e558456ef11ec
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 0.9996

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://leonvi.ru/123?utm_term=death+note+light+and+misa+kiss+episode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377936/normal_6024ad36c828f.pdfIn PDF document text
    • http://onlinekartiadesi.com/hiromi_uehara_blackbird_sheet_music8vrqw.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/CgjjcP0/12748366882.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/eXVhbhf/island_of_the_blue_dolphins_book_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6022925aad33c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_60132b015be2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_5fe722fea498c.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/hccygcY/kerala_models_hashtags_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5fe9e1af32ddb.pdfIn PDF document text
    • http://indonesia2health.online/bangla_calendar_2016nen9g.pdfIn PDF document text
    • http://power-guard.shop/noloxulifqjtbh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fdec6505903a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_602ee9b4b5f19.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/yDKPggY/miketiwowefivolizibugeg.pdfIn PDF document text
    • http://meetsucre.pro/pakukegufevajigadax919h3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389354/normal_5fc9516ae3ccd.pdfIn PDF document text
    • http://procripton.com/haverhill_ma_police_accident_reportsoyqi5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xezujuxoz/ritiwuveworujoxumegagufag.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/zesexopagafuvitemapuga.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 8448 bytes
SHA-256: 79b552b1e33dca8a0a3784815ead7a96cba6a3ed7eff1e4d4f3b0f367ff902d9
font_01_sfnt_off000153e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153E3 5128 bytes
SHA-256: f7d1870e1a547460f552b16ba0bcc59f38149b366aa2f4aece4ba5afd211df99
font_02_sfnt_off00016531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16531 10756 bytes
SHA-256: a6b932474025a49f24fff5ab404b0e26d0b3c6b58270e768d21d66814b93fa52
font_03_sfnt_off000189aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189AA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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