Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf8f5cbe4c6c677…

MALICIOUS

PDF

35.1 KB Created: 2020-10-15 00:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9b725ebaec2c7eb4fd09ba677850a743 SHA-1: 2bd6b2f15dabfd21fb1d1763acaf370cf70803ec SHA-256: 7cf8f5cbe4c6c6773c2f77919eaea2e87b48c9b59e4c16faafad23fe89b9d183
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=nancy+drew+books+pdf+google+drive In PDF document text
    • https://site-1040513.mozfiles.com/files/1040513/dragon_age_inquisition_nightmare_party_guide.pdfIn PDF document text
    • https://site-1040574.mozfiles.com/files/1040574/lovoje.pdfIn PDF document text
    • https://site-1039863.mozfiles.com/files/1039863/livojomujexasoki.pdfIn PDF document text
    • https://site-1044184.mozfiles.com/files/1044184/unfold_premium_apk_3_5_3.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/fukun-zexepimikupi-jutanu-garibadile.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/bd55ea4.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/bamunekavif-zozisikalafo-lugawo-wurifupit.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86febc4b131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f870baa16f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f877298992d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8744e757979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f87704db5420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8768c38d0a5.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/d4d04022-fcf7-4d3e-93e2-fa32470aad8b/tefogowasupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59302671-2250-4f10-a2a7-e26fbb6b088e/67718308324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3d0c03-75bc-4412-ab13-288b6e131b1c/66944925376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71106a34-2a2d-4d02-87af-9cf07e75fc46/36277497760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48010a1-e8f9-4613-b0cf-a5efc57734e9/kitubidozipalurewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/coming_home_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/rozinogedaju.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_off00004a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8B 5752 bytes
SHA-256: da747b30385e0ed5933afe233bf79546217de4dd1287a14243ca0dfa43678d7c
font_01_sfnt_off00005e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 9660 bytes
SHA-256: 90eb18e8edd1a0c76ec374cb62d375726e31bc2e74e0802bcf8b0d241a025c10

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