Malicious PDF — malware analysis report

Static analysis result for SHA-256 93039dc76dd8a4f2…

MALICIOUS

PDF

72.7 KB Created: 2021-02-26 05:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b5f6935b6681c6a9b6f9f4060c2d245c SHA-1: 125a4a19ad6a326c39a3cf6538c386e682ae878b SHA-256: 93039dc76dd8a4f25eb529d9d9abb014165d926ae1b1858995aaea04960ef360
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a site related to 'clash of clan war attack town hall 10', suggesting a lure. The PDF structure and embedded content are consistent with attempts to disguise malicious links within seemingly relevant text.

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://leonvi.ru/wix?keyword=clash+of+clan+war+attack+town+hall+10 PDF link annotation
    • http://zikewexer.scienceontheweb.net/wajozogutogamulavoregofo.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/9176282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_601279eb67859.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/singer_4423_heavy_duty_sewing_machine_canadian_tire.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/050abff7889459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_60299f7faebff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fe17999d1e23.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/77866464352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449193/normal_5fe53b1aad2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_602194bc06779.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/zafijukopa/dorit.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/devops_handbook_audiobook_download.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/brian_tracy_eat_that_frog_amazon.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nessun_dorma_translation_english.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/best_political_philosophy_journals.pdfIn PDF document text
    • http://zuputes.atwebpages.com/skyjack_3219_for_sale.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_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 5224 bytes
SHA-256: 4ffe92d776c03cf16bab1c7f663c538408612e06173f2ba11bea92efd7aa1522
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 10196 bytes
SHA-256: 64e5ac18e15599c0e6888db70f60e06c4bb7717af26a682c3ab52082a9524ce4

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