Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc84911e6c3fd00…

MALICIOUS

PDF

44.1 KB Created: 2020-11-02 21:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7e0b497abef454dc2032a5f0df24841c SHA-1: af61b5a34f79f79946180dfac39c12b1cbf3d416 SHA-256: 2fc84911e6c3fd003a898ecd8da3eca18e7fab8ac5f4f1dfb9ef852a6d8980cf
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.me/123?keyword=princess+mononoke+spirits In PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/6070922.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/rawimisewibububuda.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/91a3059053b70.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://uploads.strikinglycdn.com/files/5eb9f981-175f-4e66-88a6-059e5ef0ac30/17412979906.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/57499915865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65427040-2680-44bd-a957-5bbbd41536c8/danos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/bose_soundbar_500_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/segunovusoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0364ad03-5b3b-4507-8d69-4b9e4b8835c4/62039626213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8887/4146/files/9593752486.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_off00006100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 4692 bytes
SHA-256: e1d5bcd742340264be78e2fc62ba6647a8513f88c879c317473e50b45fdd9257
font_01_sfnt_off000070c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 10888 bytes
SHA-256: dd0aec46c91da69bb2c627df56f617210b23a88548a74891bd4058651d590a19
font_02_sfnt_off0000961d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378