Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceac244fa7e929d5…

MALICIOUS

PDF

76.7 KB Created: 2021-03-21 07:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 54a706d79af737f30cb5ac4e124572ca SHA-1: bcfd5fd69821058c72ceac7613d9d197ef297317 SHA-256: ceac244fa7e929d52a83f4683911c0701b0ec03c17c84b5f371ea85ac748044b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to 'botokaw.ru' which is associated with a keyword search, suggesting a phishing or content-luring attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates malicious intent by identifying a link farm on disposable hosting. ClamAV detection and ML classification strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=cambridge+pet+writing+part+2+pdf PDF link annotation
    • http://bcpzonasegura10beta-viabcp.com/act_math_practice_test_2012dsbrd.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/4016718.pdfIn PDF document text
    • https://kiburosipaso.weebly.com/uploads/1/3/4/6/134601321/f8cff58.pdfIn PDF document text
    • https://zibalezenakex.weebly.com/uploads/1/3/4/3/134372387/fotifexezaru_zugukava_nututezozajigu.pdfIn PDF document text
    • http://lessonsonline.site/bafebaxefug8rv2g.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/pilgrim_at_tinker_creek_analysis.pdfIn PDF document text
    • http://futup.ru/97250972078cwek0.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/984584.pdfIn PDF document text
    • http://aycotoro0.xyz/ejercicios_comparativos_y_superlativ62u0p.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/5271684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_896f0fa19cea44fab9e08bfc7cd8938f.pdf?index=trueIn PDF document text
    • http://loxupobupibim.atwebpages.com/adding_and_subtracting_fractions_interactive_notebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/les_alphas__imprimer.pdfIn PDF document text
    • http://degibenogezegu.epizy.com/98978177579.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/free_photo_calendar_template_2018_uk.pdfIn PDF document text
    • http://vugoban.epizy.com/hoover_wind_tunnel_rewind.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/makeup_salon_games_mod.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_b07338a7c4f74294b485a2489ae154ce.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_6146769a294f4ff4903d7732f4ff1ec9.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_5ec5346a3f424603aeeedb77a53f7c63.pdf?index=trueIn 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_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5420 bytes
SHA-256: 2d535794c621268ccd33df91134c0a91e2e567430d63aef91c8ec1b66318e877
font_01_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 11072 bytes
SHA-256: 316d0938d754538aa1f2f9acc3121b05389065a86bd77982b0fd1e108616d720

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