Malicious PDF — malware analysis report

Static analysis result for SHA-256 18542c08e542006f…

MALICIOUS

PDF

74.5 KB Created: 2021-02-12 22:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53200da264d27e971013070291ff33ad SHA-1: 12c35b1cece60cb7007ba5d65bb5cbad384db4a8 SHA-256: 18542c08e542006fa91d35ae88c838045e7900e8a14c62b2c7bda4ee1a2bd637
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to a 'combo guide'. The presence of numerous embedded URLs, many pointing to disposable domains and link farms, strongly indicates a phishing or malicious redirection attempt. The primary attack pattern involves tricking users into clicking these links, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/wb?keyword=tales%20of%20berseria%20combo%20guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373985/normal_5fec348805a6d.pdfIn PDF document text
    • http://wgathering.org/322396313635dryx.pdfIn PDF document text
    • http://fullhp.info/mokinojlacbz.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/audiobook_won_t_on_iphone1j2fn.pdfIn PDF document text
    • http://fastpeysistem.online/unmarried_certificate_format_in_englishgfu19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449417/normal_5fdf26619711b.pdfIn PDF document text
    • http://reduslim-official.website/macroeconomics_gregory_mankiw_8th_edition_free_downloadfw4id.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fef5a4c9a241.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/d5d1294.pdfIn PDF document text
    • http://digitalcalakk1.xyz/armas_silenciosas_para_guerras_tranquilas_descargarr2pj1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_5fd09fc3f2285.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/kixadarunagi.pdfIn PDF document text
    • http://mugedly.xyz/katekikamuseliw270c.pdfIn PDF document text
    • https://kumajevebak.weebly.com/uploads/1/3/1/8/131856027/wijimib_boruteretez.pdfIn PDF document text
    • http://barberking.best/waviwibosakotolalumotewu49jub.pdfIn PDF document text
    • https://jutoxanifi.weebly.com/uploads/1/3/5/3/135321179/maxuzomovidogu_gomobomiduk_gizipo.pdfIn PDF document text
    • http://natlab.ru/lapawulavijidimejisoxa2tni3.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/tisegovofu/bebofivafuru.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/davapavikun.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/ludesumavojuzobabubuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/android_adb_logcat_filter_by_application.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/95396127563.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_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 5432 bytes
SHA-256: 4d7c783672d1fa0d1bd4b7db3d0a1828ca926ce2d8f65568da9f0718c6d8d5d8
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10284 bytes
SHA-256: d0b474fafe41d691a8aaf8c4b8a1de9092fd3ef4df20286b7a77b68763ba6ba2

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