Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb920866e8712002…

MALICIOUS

PDF

45.8 KB Created: 2020-10-30 23:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 3ef1649b00607581268dfe3c5481f4d2 SHA-1: 910618496abd241af812f2680d8665718d8ea5ae SHA-256: fb920866e87120028d83c63676a655cb57f440e373db90918466ac2a839ef9bf
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://ttraff.cc/123?keyword=d%2526d+elf+rogue+token In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/fetewafokapujojajum.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/rumafoz_balesobodow_gixar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_5f969ec435010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f91504f505da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f943f3258fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f887c77753c9.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/cc94e2f936e8f2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce908ea-1a56-43ad-bd15-78d7f7db212b/ketoremetupefapuxumegixug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1405/0720/files/herpes_simple_tipo_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93697872-1e15-43dd-aec3-a3ebde0798e8/42460205285.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_off0000730c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730C 4156 bytes
SHA-256: bb1702a9e9b617346157f9ea6f36cc14559c37d4a4a2cf683ebd57dce9d2c082
font_01_sfnt_off0000813b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 13196 bytes
SHA-256: 1e12398c0902d77464eeecbe7800b9666f6fa2ae2d150fbc2aa69e5b0c381bfe