Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fedb22aa988c0de…

MALICIOUS

PDF

43.1 KB Created: 2020-10-17 13:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 78f3a1e24889f38066150fff2081db54 SHA-1: 22088be326637d74998345bb82c08228486c3d52 SHA-256: 9fedb22aa988c0dee86380ff768072dec89585853418afefc58a253dbb83d592
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://cctraff.ru/pify?keyword=breast+screening+guidelines+us In PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5841c67d8.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/2c24a75d55.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/rivibozedugamag.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/dabb2ebf-1951-4a6c-b6cc-ad0d81e1de5e/zexupobawixodobakib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f133609-ecf1-4bb0-bd8d-4d7a2e278784/xudopavudajubopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f97db4-5680-41a1-ab4a-b2024ab00461/kamemefizixavaratowekad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40d963a-8631-4ba7-aa85-5fc904e55e2b/wegusewugamisijigox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9109/1875/files/dragon_ball_dubs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6547/8820/files/fijarepox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/el_dorado_hills_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2857/4119/files/vocabulary_clipart_black_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a358f261-55ea-4d17-b689-dd2661036e7d/93888331693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c526e7e0-0441-4301-906e-c330c6c1ca11/risou_no_himo_seikatsu_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edde751-5b7f-4029-b3d3-77d3029484b6/97275112936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfcba703-b7d5-4402-a0e6-a5b7a4387bb9/podez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae9907f-3af5-49ac-ac1e-c512072d0beb/44326867896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7061501-3520-4d96-bb6b-6a14f1f41b15/36122207545.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_off00006bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 5156 bytes
SHA-256: edb45a669820f7cc470a3e289853b48ac806e7e83c5e3eba0546dc1553de3d47
font_01_sfnt_off00007d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 10088 bytes
SHA-256: 0941e920753133043a78ed5f46e1ec3d8d2bafc4d48c26a60c63fe2d23ea973c

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