Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0a308da269a9eb…

MALICIOUS

PDF

77.4 KB Created: 2020-12-17 20:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4da4fecff0e4c6506a0567b77b78b107 SHA-1: 45dc698310bf71a621384b3f29ce06865ad2c833 SHA-256: fe0a308da269a9eb900504834e9edf7311dc66d83b1e55dd3ec31b729dbd99e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution lure.

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://traffnew.ru/123?utm_term=how+to+tie+a+shemagh+for+hot+weather PDF link annotation
    • https://vagobodowi.weebly.com/uploads/1/3/4/6/134600101/9258913.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/namajadomu_jumaxevewew.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9373972.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/2a5d147a59386.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/tosevud/allan_holdsworth_fred.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/75445027925.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/balupu_movie_mp4_video_songs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d67911f6a41984a7808b/t/5fc712bfa3696915e21cccff/1606881983831/minicraft_plus_servers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2caa5d25-ca94-4399-ae09-28d7c3f832c5/92979948323.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/totemedusanojuwaduva.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/invitation_maker_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/reported_speech_if_whether_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6870f9-5cb3-4dae-92db-c17ebe49f4cc/font_with_dashed_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0340b64-5610-40eb-aa94-97362f454aa1/beyblade_metal_fusion_episodes_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cbc872-33b0-4654-be4f-b629b9067df4/forever_my_girl_book_author.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_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 5204 bytes
SHA-256: f1269cf18d8da4e0a2697a6200908c13e394d4235aaaaa54069fc39d0eb1747b
font_01_sfnt_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 10280 bytes
SHA-256: cac9ad317773f68243effe6d30c02a07fb4e93c87f4725731549e480a613fdd4

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