Malicious PDF — malware analysis report

Static analysis result for SHA-256 38867ad5b1bafc9b…

MALICIOUS

PDF

49.5 KB Created: 2020-10-17 23:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 18a5344cb622b5774f9e0d73195b4858 SHA-1: bdf88c28602e56f9ea932c086b5d5eaa9148ea6e SHA-256: 38867ad5b1bafc9ba8eaeec866fe1c9b23bb49fcf2cdde8a8ef670164a2afed1
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.club/123?keyword=alimentation+b%25C3%25A9b%25C3%25A9+8+mois+pdf In PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/9097335.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/nokekul-feboji.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/paralavosezoxekularu.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/99b134370fd.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2b1fca022bd.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/poxuremig.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/tikitiku.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/fagelemowemematejeni.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/dezolarawaz.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/1/0484/6442/9217/files/3ds_homebrew_custom_themes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/lyman_49th_edition_reloading_handbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7622/2621/files/suzannes_diary_for_nicholas_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/man_who_was_almost_a_man_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4517/4439/files/sisejasizexeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/tarujani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9068/3069/files/cosine_approximation_to_the_normal_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/nursing_care_plan_for_tia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1362/2936/files/22471731558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/selections_from_the_prison_notebooks_1971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc875f15-c19b-4ab0-9d80-a02919a71de5/94529925588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95ac5f3-ba28-4473-83af-397cef382d40/9017940052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15bd8be-791a-47bc-98ba-d7325ae23ad1/bomerifumef.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_off00007deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEB 5556 bytes
SHA-256: af4ccc561e0d8d89466298d303e7de02a5a49b34468a70eccf74d73b918c6ecb
font_01_sfnt_off00009074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9074 12164 bytes
SHA-256: 9c00f60becc97ad6245a8331c48830eae746f34de86cd2d96dc488ffcc596cbb

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