Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe78bae44e0e5ffb…

MALICIOUS

PDF

52.9 KB Created: 2020-10-19 02:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a30e16e4265d301e5840787d03580de0 SHA-1: e130daf32f329b41eb8a0441f44f2d9cf8883895 SHA-256: fe78bae44e0e5ffb5e6681a28f228d1b599446f2d4ee4870d9ca367f45294686
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/123?keyword=tetris+android+free+no+ads In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/surepakedubujenuzu.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/6894170.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/pakare.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f8cc3750b637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_5f8bfd0cc9a77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f8aa25c287b9.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/1/0496/1665/0389/files/livejuxoxapixijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/jufifixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5595/3558/files/the_scarlet_letter_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffc630b-5aef-4659-878a-f8f8a8f7e1a2/jorokalitenesijokugij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f5fcd3-0dab-4816-bfef-02b9527bda20/5338347765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cfc7e7-1a75-4baf-9542-c045bde59a99/lafemujeluwovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9bbb9d8-23d4-4eed-9d03-918129b885b9/serum_1._2_update_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1664/1950/files/study_guide_quiz_questions_lord_of_the_flies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/lol_nidalee_jg_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/yokohama_yk580_tirerack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edfed8f-42f1-4bc1-b9ad-45475dea860c/52018665995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c56d82-a185-46f9-b767-4336ceed25bd/gefubuzijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5799eac9-7fed-439a-a88a-d503eb3b876c/tojorajorujusemipemekuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd5a62f-84eb-4b10-a7cf-5a2707a47c0b/16328898942.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000706a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706A 4816 bytes
SHA-256: ba063ddb9110cc5856a802c73ac98c810e9a50f4ac7573375620a38d9d95d448
font_01_sfnt_off000080cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CB 2904 bytes
SHA-256: a0fe2daada3f9176e98494b10909635b23cf183d11683fbcbfedfb157e9710fb
font_02_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 10364 bytes
SHA-256: 0dd6f10e94cbd85ab0880307ae455bf3a0d96d09f0f8a91056aa708ae57be31d
font_03_sfnt_off0000b077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB077 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67