Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f07c85a3e402c7…

MALICIOUS

PDF

43.8 KB Created: 2020-10-25 10:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 16165ed7eb4b7b43f7f438a04b60b90b SHA-1: 42082d71e571c1da6572380ecd8fe88e01889e6d SHA-256: 97f07c85a3e402c7e2f7aa07254c274e42eb1d767210e1bcca55a660b05cee9f
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.cc/123?keyword=download+twitter+video+apk+pro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f909ea587f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f88a608a8139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f937d79e1dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f88462968038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5f9527ffbfdd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f9105f1355d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8bdb65a4826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8fb88278e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f8c25aac5f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8e8d87b0bb8.pdfIn PDF document text
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/jadekuvanivebi_wowum_penudosisu.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/doluxuvefifulazodut.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/793d1bf1-fc86-4802-9273-f8ddc481198b/wuzukupazonuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f832c6-1d16-47a0-899c-25cb113e2f3e/23502578071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7972e3e-647e-4b59-b1b9-e00163a9657f/zaramusevevuwisewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ec9924-68c2-4a11-a7da-f2a6fea7cc60/fimuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633087ab-4645-4bd2-84ff-5adbc8205ce0/4326374202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4939159-f482-48ea-a375-4f02d0697592/41210619911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6357f0d2-b5fc-47fe-8335-e336f5d232f9/96964689958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ac8a35-df2f-4247-b0a0-ccbeab043e4f/19468551738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21218aa7-ab22-402a-bbac-f2f8b6037efa/26882388670.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_off00006d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 4992 bytes
SHA-256: f388d00fa171f0e4ad5b9ceddf87c90a7679232224d5c4127a11d319f29ffbe2
font_01_sfnt_off00007e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 10676 bytes
SHA-256: 8eaff54e7ac58e2320f70893f54acc137839051a3ba2bb0ff80cd2b8ea600560