Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdda743d65edae5…

MALICIOUS

PDF

75.1 KB Created: 2021-04-03 14:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f40be5f4eff630f5f435bfce7bc82b4f SHA-1: d376114405dfa83a965ac7d85325598b8e0dc20b SHA-256: 4cdda743d65edae557b4be800e44bd8f82004ca56a087ed9eee603693b276907
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable hosting domains, disguised as search results for a common query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/aws?utm_term=who+makes+the+best+gas+self+propelled+lawn+mower+under+300 PDF link annotation
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/40bc1d41681.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/6th_grade_vocabulary_words_and_definitions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fca4048b4d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd33fb8383d1.pdfIn PDF document text
    • http://degimogug.mypressonline.com/vafuwepu.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/architect_s_data_3rd_edition.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/27625331756.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/how_long_does_a_ford_escape_hybrid_battery_last.pdfIn PDF document text
    • https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/1109432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5fdfb3881ffba.pdfIn PDF document text
    • http://gililofus.medianewsonline.com/damodarastakam_telugu.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/price_action_scalping_download.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/xigepivukenidatizorut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/48080405360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054cf4a8-30ad-4dcc-b460-815f59d188b3/33982753488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df3f0ea-148b-44a7-a269-8b6bfc2d7c4f/autopage_xt-72_lcd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b700f3a9-59eb-4c84-b3fa-ae8b06fe6168/how_to_start_lifting_weights_male.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/wuzojo.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_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 6068 bytes
SHA-256: ca022a3ee6e4387d46bd4d782f0283a3f73144757b17881e674e3c8a4353bce7
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 11028 bytes
SHA-256: 0ce6c89846cf6e10a7fe2d512e9eab41f95ecd3ac7b518b2a2b95f54d9dbf01d

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