Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be9179a146fb3e3…

MALICIOUS

PDF

51.7 KB Created: 2020-08-14 08:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8d854515958b443eb0eec08e1dccd1c8 SHA-1: bef388f763b63db792a3849d1fca2863487bfefa SHA-256: 3be9179a146fb3e3660170bb0657e481c51ceebac4370408be8a8689e681b08e
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.ru/pify?keyword=carrom+pool+mod+apk+1.+1+0 In PDF document text
    • http://degibebe.photo-stories-by-rongoor.com/uploads/1/3/2/8/132814930/tulal_rupusi_wiwazomaremabi.pdfIn PDF document text
    • http://files.five16filmfestival.com/uploads/1/3/1/0/131069781/vigufomederuwoxune.pdfIn PDF document text
    • http://kuxov.lucaspbutler.com/uploads/1/3/1/3/131398140/3774725.pdfIn PDF document text
    • http://nimupit.noleyreid.com/uploads/1/3/1/4/131410227/5647277.pdfIn PDF document text
    • http://bujuli.deanmichaelzadak.com/uploads/1/3/1/4/131407558/bazimapedatu.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/1/0449/0467/7543/files/comprehensive_english_textbook_for_senior_secondary_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/amazon_aws_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4477/1739/files/physical_science_grade_10_answer_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9799/6955/files/pejivefoxudozejivar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/bavarugili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/bsava_manuals_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7789/3270/files/28349266118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/waste_management_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/62202783940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/fumawerudux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/is_daemon_tools_safe.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_off00008dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC1 5120 bytes
SHA-256: f68fc67653ddd822a1ed508c37c626419071eb33bbbc5d526d052292143a84d3
font_01_sfnt_off00009f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F19 10120 bytes
SHA-256: 0f6ace4aedf5562370295193e33e26961193400a5d2925b3bd5d9b2b497d8c92

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