Malicious PDF — malware analysis report

Static analysis result for SHA-256 e781828593155715…

MALICIOUS

PDF

75.5 KB Created: 2021-06-06 04:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 387bf225a2205dc2fba71aaafe6f102f SHA-1: d72cde57fc494ce5ec1a1129383fdfb5903d9a49 SHA-256: e7818285931557151e342434583e9772c806f5a1ba0a65951ae7a3f3a27f4107
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 0.9997

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://philabc.ru/pbw?utm_term=has+flagged+your+account+as+settlement+reported PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448992/normal_5fcf18524b097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5ff9e984a44c2.pdfIn PDF document text
    • https://ronesina.weebly.com/uploads/1/3/4/7/134707074/5594205.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/8377570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fdb7be824cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_601e32c216c06.pdfIn PDF document text
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/3961155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_6006b709bdfc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natizasex.pbworks.com/f/nananil.pdfIn PDF document text
    • http://lajunola.pbworks.com/w/file/fetch/144701490/bonnie_simulator_4_gamejolt.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/f/73382295351.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/w/file/fetch/144536205/gavepemum.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/ridos.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144650724/20460412232.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/f/lock_some_cells_in_excel_sheet.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/ejercicios_resueltos_vectores_y_rectas_4o_eso.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/w/file/fetch/144507273/50543362770.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/w/file/fetch/144594984/asphalt_8_lucky_patcher.pdfIn PDF document text
    • http://giribuv.pbworks.com/w/file/fetch/144541362/c_sharp_programming_books_free_download.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144425217/power_probe_3_fix.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/salesforce_admin_exam_preparation.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 5536 bytes
SHA-256: 7650794c9c85b28090759d9ad15a63f260151255821bd75bc55f72dc57f24deb
font_01_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 10540 bytes
SHA-256: 681a09899337e343bc002e7aa6bfc31c0cd831d10e47850140e4f83f63ed2509

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