Malicious PDF — malware analysis report

Static analysis result for SHA-256 4301c904241fc9cd…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 03:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e4b3fd1f49400c3829884053fc0b8b0e SHA-1: 26441edda8da70fb10dd99214c7e8a8cbd21f700 SHA-256: 4301c904241fc9cdf85856cc9c93b824d0682a8b805c5d68b26d195e068f92ac
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.com/pify?keyword=meditation+for+beginners+kornfield+pdf In PDF document text
    • http://files.tweetyjill.com/uploads/1/3/1/3/131381799/4773489.pdfIn PDF document text
    • http://files.bovinepracticum.com/uploads/1/3/0/8/130813447/508306.pdfIn PDF document text
    • http://files.kiberacreativearts.org/uploads/1/3/1/4/131406082/juvudapije_kaxivodubek_zoxulafati_munuxaburepe.pdfIn PDF document text
    • http://files.rachelheltonmusic.com/uploads/1/3/2/6/132681033/424764e2.pdfIn PDF document text
    • http://files.pierisproject.org/uploads/1/3/1/3/131398598/660a41e940.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/47498788785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/98260561254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/30264208355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/79786440864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/archicad_training_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/neet_pg_2020_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/handbook_of_big_data_technologies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9879/0301/files/dajafuloji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/ielts_listening_and_reading_answer_sheet_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/ruxadun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/tamubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/daxitikaxoworafuzodipak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3541/0077/files/60099188055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2129/5006/files/convertir_a_dwg_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/wilojakinukap.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_off00006c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3B 5420 bytes
SHA-256: 27750140936920a72cdb3f875aae4e491c1c330ffba636dc6ba60abd1ae71fe1
font_01_sfnt_off00007ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC2 10272 bytes
SHA-256: 1d3345b756b33648d2d0e3a0b62f3cd1486f26c1d8f93aaa2755cd7154e98bfc

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