Malicious PDF — malware analysis report

Static analysis result for SHA-256 acec558068f72bc1…

MALICIOUS

PDF

49.2 KB Created: 2020-10-26 02:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bde7ca8414b0aaca4de5cfad989277ea SHA-1: 94e4fe0b4a2833b27520104f886f1d1ebe7f3b77 SHA-256: acec558068f72bc12d3dd31d4bd0078cdd5508b81276953100ab9d7f894dcf55
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=marvelous+designer+tutorial+espa%25C3%25B1ol+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f8cfe499c455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_5f9604be3b684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8fcb44dbd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f9602751bbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5f92863492b5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8a1d195a991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5f8c43abe6ffb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tetazino/pabug.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/99798323938.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/22698442208.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/bifamigovevasoxomas.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/devi_bhagavata_purana.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/dafor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852e0e0e-738e-4051-924b-6b37d332b700/botezovepujagarasomexuras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f76b213-88ff-4c2b-9622-548d08d360d3/puwofadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cd6da1-0bee-435b-bca4-188ddb5b2265/game_theory_an_introduction_steve_ta.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/amsterdam_city_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/stretches_for_runner_s_knee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 5368 bytes
SHA-256: be3cd49c8ef5fdc4c7f71f893e2974278d8a03043acc2093520cbda6a594963b
font_01_sfnt_off0000826c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826C 10908 bytes
SHA-256: 60aa86fd7b97577eab9d2d1579364ec937567ac478989cef8a2623228bf1fd4f
font_02_sfnt_off0000a6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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