Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c345f13d49cb10c…

MALICIOUS

PDF

79.5 KB Created: 2021-05-02 23:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0d2b40c807ff10a584fda3218e86237 SHA-1: 9a61d35632d66e45c4acec8a1f2cd25144407f46 SHA-256: 5c345f13d49cb10c310b2e8cae55dfddb98fff997dbe457446c7ab80d754fede
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 0.9998

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://fokemale.ru/strik?utm_term=jbl+xtreme+2+portable+bluetooth+speaker+%2528black+stereo+channel%2529 PDF link annotation
    • http://dulisakip.medianewsonline.com/capitec_application_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_604049d797d94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470405/normal_5fd0552d21716.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/biology_class_11_ncert_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_6065f9b69c171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fdb32423085a.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/78943634815.pdfIn PDF document text
    • http://torchqbfl.fun/dekatoluwutunikozott7lg.pdfIn PDF document text
    • http://onlineeshop24.xyz/xefapeve0nn87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fe18bad473de.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/miocardiopatia_dilatada_causas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_60584ac3188d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_6016bdb7caf63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465010/normal_604d9399d445d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b177cf20-ab77-4034-8fc6-846aecc0fbe1/daxasibodesubakokifapa.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/bimebakajevi.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/best_java_programming_books_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3c24de-c6eb-4c3e-8ac4-438ebf1ec8cd/the_lottery_theme_analysis_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805a8ba4-34d9-4148-9885-426c76322dad/hp_p3015_maintenance_kit_install.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_off0000f8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AF 5720 bytes
SHA-256: 06814fed87dc64a14cd056beefd2cb82cbe48c15c3a266b0e4c13c60c14e6a25
font_01_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 10708 bytes
SHA-256: 831e782cfeeed8606237a13a934aa67f13082614973b257ba12511fd189a82fb

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