Malicious PDF — malware analysis report

Static analysis result for SHA-256 21efa03e81654015…

MALICIOUS

PDF

41.1 KB Created: 2020-10-31 13:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f3e994697d2e01a00a919bd5b727f37a SHA-1: f74f85229c07b1305a30c146a0f73dfb4348e4a1 SHA-256: 21efa03e8165401541c8a49f841f9ff93a69ad197d767354f2a3eb17a5ed1f91
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=reliance+606+water+heater+manual In PDF document text
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/7357967.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/jowutoneranemuk/ayurvedic_treatment_for_diabetes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/3193521073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be54aa24-7aa2-4f7a-a612-ed00db3941ca/98266397405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd7a3d5-772f-4486-8143-5efad2ad4bd0/zigoxolemovamufini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eec615f-cdf3-460b-a5e6-a78822948d24/luperiwabasofukarafiguv.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/there_to_be_past_simple_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbc7ae1-846b-42aa-b33a-b5a14bcbf2ba/the_american_pageant_15th_edition_ap_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7753fbf-7a98-4c79-a86e-b3a47b2c63a6/adobe_photoshop_cc_classroom_in_a_bo.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/epidemiologia_clinica_robert_h._fletcher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8848c38-0e05-4327-bf6e-1896869671ec/walopaxonenogufiguwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbd6a72-6ed2-4386-ac48-2574be23a8d3/rokipi.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_off0000637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 5256 bytes
SHA-256: 776a22bdc28f401feadf4e7802f20f9619e370765db4559b607817c5579579c4
font_01_sfnt_off00007541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7541 10144 bytes
SHA-256: d7107d29c04c0187ed726077f5d9b9ee2d0841883ccd87916fe33842ac0494ca