Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc39fe76dcbc47fe…

MALICIOUS

PDF

77.1 KB Created: 2021-02-23 21:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: adb75e4f73e4ac6f659e17d4a0c8b659 SHA-1: 97d4f02d4dfc5613b561311ad4f562f21c7cf891 SHA-256: fc39fe76dcbc47fee327d0f3638b1ea0d1660dfa3f3607642fcc01eb5d39eee7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=what+are+the+historical+foundations+of+lifespan+development+theories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382194/normal_6026b0c4a7e86.pdfIn PDF document text
    • http://obschee.xyz/tonikosefezafomifuzowe4l4og.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/aeb81e61781ec.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/fesatiri.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/rizanigo-terama.pdfIn PDF document text
    • https://pixizibonemitu.weebly.com/uploads/1/3/1/3/131382366/soneru_sefaxamimufo.pdfIn PDF document text
    • http://hotita.fun/fundamentals_of_game_design_ernest_adams_downloadya74t.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/6475742.pdfIn PDF document text
    • http://powerhdniy.space/6334024962654d07.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/8446bca887c.pdfIn PDF document text
    • https://tuxedibuzi.weebly.com/uploads/1/3/5/3/135350702/4c80b693a268828.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/mere_dholna_sun_mp3_song_free_download4jhsw.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/zomuzigo/blackpink_boombayah_mp4_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/australian_super_growth_fund_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/jepavesodipisigapi.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/ecuaciones_de_segundo_grado_ejercicios_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/35448493866.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/partial_interval_recording_data_sheet_example.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_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 5468 bytes
SHA-256: 66d7adbaa6f1ce589277f750f83151688cbcfd6f5b1cbb0ca5b30aadd442cc1c
font_01_sfnt_off00010405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10405 10116 bytes
SHA-256: 03396cdf095cf6ffaa3ca17ea5d8fb40dccfb03b5b40beb625a80f414c0cfdbe

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