Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8db2aba16f58df4…

MALICIOUS

PDF

78.8 KB Created: 2021-05-09 17:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3fb8d2d2283d63961658dea16f590e8d SHA-1: c50b4dbc8b262c9a115ee23a032489a302b5108a SHA-256: c8db2aba16f58df4a8b8a68d48e0b3dbc1ed7475c53bcc3be78366ebf66394e7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to fixing a McDonald's ice cream machine, directing users to a suspicious URL. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, and ML classification strongly suggests maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

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://resalured.ru/strik?utm_term=how+to+fix+mcdonalds+ice+cream+machine PDF link annotation
    • http://bezprovodov.guru/cannot_connect_to_my_cloud_outside_network5e45l.pdfIn PDF document text
    • http://timinome.getenjoyment.net/how_to_sodastream_fizzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_602ce0e425146.pdfIn PDF document text
    • http://thedouche.xyz/98976248533muhft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460048/normal_60039e691fd67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_6019b3969e1c5.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/65432522584.pdfIn PDF document text
    • http://swiss-gear.shop/porevereburazixuvulunipilbgdd.pdfIn PDF document text
    • http://fresh-ita.space/problem_solving_definitionl1bdd.pdfIn PDF document text
    • http://myyshooop224.site/delumigizoforuwiwuv8g17a.pdfIn PDF document text
    • http://propovar.ru/oxford_english_grammar_book_for_class_7_solutionsz7vvp.pdfIn PDF document text
    • http://kuxni.su/zemiwibozelipenqpty2.pdfIn PDF document text
    • http://raifaisentgo.online/dumubuwofojisizokumidatpptaj.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/tomamujuf/literatura_concisa_alfredo_bosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318a8c6a-27b8-4f2e-b06c-a7d32ca880c0/gudakelasemoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e227f255-14cf-4e78-9369-bebf1a50d7bd/centerpoint_sniper_370_scope_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/aba_english_apk_premium_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02457cb8-d2c8-4358-969a-9a588d7e2221/29327833512.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/zoxafokajixuxal.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/permenkes_46_tahun_2020_akreditasi_puskesmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5311deb-4ae3-4164-896a-4b6a2cc6ac7d/ranger_reata_boats_for_sale_used.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/45200522392.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_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 5380 bytes
SHA-256: 003f802b5c463ec0efec4e3c0562c077dd3b3b23ee6d397c4646d7536526d7fc
font_01_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 10964 bytes
SHA-256: fcb397bc442fc949d51e3fc369b6f27732b4363c32576039c6757ed1c3e0cf96

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