Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3904c93b3435ade…

MALICIOUS

PDF

59.7 KB Created: 2020-10-25 17:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dc8714942dc27ad6f7405cf854f8edbc SHA-1: 7196c613ed3a66cf96d4c25b254d016fd7992fc4 SHA-256: b3904c93b3435adeedf8751260582663f9819e68b8a77d7d4af04d2afbef224e
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=magic+valor%2527s+reach+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8923f6ac165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5f92b36865c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f93c93eb9368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8f688318d19.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/juzapedewevomup.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/5328863.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/8076357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f88bf4e3f290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f89f2e3bf3b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f8ef75151b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5f8b475fb2166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f902c3447ab4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a704.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a704.bin)
    • https://uploads.strikinglycdn.com/files/6d79cf3c-de7a-4bc2-b105-b4d141530be2/15532937522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2854a26f-f26d-493e-9a11-ead42c0e6fe4/23655761966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb83f14-3403-4c73-9fbe-ad0dbf617d14/rajevosas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c4abca-a7e0-436e-b901-94eaa23a522c/61742007213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7267ff5e-2c35-4c2c-9d4b-c3b771d93423/gopazonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7225/8983/files/people_playground_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/fisher_paykel_multifunction_oven_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3879/1582/files/download_novel_wuthering_heights_bahasa_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8427/5109/files/judgment_interest_calculator_nsw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/wps_office_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5964f571-9c34-4e9a-be2d-fdcdf22ffc49/50568855702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037d9bbb-e5a3-45dc-91bd-1c5d30628098/52675142143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ce5144-d8d9-4363-99e7-b0b86863f9d0/xafufovurazovoxafulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93c6f45-3128-47e7-a630-cedeff73e073/79580859128.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 extracted file (font_00_sfnt_off0000a704.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA704 5356 bytes
SHA-256: 332a12b0340066944cde6b667f7cf616458cf3c84a779c9da2270e98612bee61
font_01_sfnt_off0000b94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94D 11644 bytes
SHA-256: 3aff30bccec511e22b5c31c6f9b9258562abaf2fe26703e2602a3a4dff8611ff