Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0a8a6805fec842…

MALICIOUS

PDF

50.0 KB Created: 2020-10-29 06:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 71db93fb4312acf4ec0b334af9cab995 SHA-1: 2e02bac37cb40fb46f27aae68498ccb0115dba10 SHA-256: 7c0a8a6805fec8424b4f4fb70c68a60b40f6f2657280091569475a9dbfbf5b94
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=imperial+infantryman%2527s+uplifting+primer+damocles+gulf+pdf In PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/nuxosibenedow.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/nimipulasosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8de3fcc3c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f88252127d3c.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/7950623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8786e97266a.pdfIn PDF document text
    • https://zumavekuganupa.weebly.com/uploads/1/3/4/3/134366180/wexawunuradimetur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f920e66ede5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8d8ac37293a.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/c169bdb2-8617-41b0-97c0-5821ff127616/xelufoxosekonodova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca524982-5856-492e-b86d-bdad3d928909/2163740652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b426025-1943-42cb-9fde-886baf326af9/pavithram_songs_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7707015a-d418-48e3-af4d-54d0bac8550b/60568455355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b22a24-d1a8-4639-a517-2cbea6db1d52/78452950002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/added6ee-dc45-4a1d-86a0-3d04caa04d1b/65209851031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675ca7f6-c7e2-41a4-b0e0-8be7d3907532/53552341196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c55688d-561f-455d-9f97-3e54b244fdaa/uscg_towing_endorsement_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a689781-5234-4cce-8d36-c0e2d08d3500/is_the_samsung_s7_waterproof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce419545-ca6e-4298-a106-e116474df319/jamijoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea06617d-1f1e-48a7-8889-11d60f5f5c9b/download_delphi_7_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce13a2d-91f1-47db-906b-8a308f093436/39927919197.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_off00007623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 5428 bytes
SHA-256: 47d39e7f3e6276816a2c8e98b80b4c5d00e25e59920230cba8a9b6310b8d4434
font_01_sfnt_off00008885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8885 10260 bytes
SHA-256: 1247a1a172451b697063b57c2d91d470c104cb00e90549aa62afe68e2ecf4625
font_02_sfnt_off0000aba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230