Malicious PDF — malware analysis report

Static analysis result for SHA-256 c498ba7568a54fda…

MALICIOUS

PDF

44.1 KB Created: 2020-10-14 19:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 04a34641826ff7784fee8f16641e16b3 SHA-1: 693a5e8c6a1491288ddbe382486f17eed096a120 SHA-256: c498ba7568a54fdad55f4c521dbfcd465caba87fac7aa33f85e1421014af638c
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=catalina+island+visitors+guide In PDF document text
    • https://site-1048186.mozfiles.com/files/1048186/5393668215.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/54642167662.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/tidapuj.pdfIn PDF document text
    • https://site-1041181.mozfiles.com/files/1041181/podadopixezo.pdfIn PDF document text
    • https://site-1041857.mozfiles.com/files/1041857/xoroguwukogodimokegobo.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/5711585.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/2147291.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/1346883.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/dulefipalep_jobowajoxugo_wiribulelom_nuzigo.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8af89563c3c02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86fcef2268f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8720d0b17e0.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/6ff5ea90-9abe-4af6-ac49-1b6839e190f9/55909260019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e549c049-37e7-458a-ac94-129107c55037/39989564683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df750133-c48d-484a-adbb-fcf72096535a/xoxurusodowifozeboxuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7967bd96-0f53-40bd-99b0-ddd3b81d104f/xiwuzuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5511033a-a014-426a-94b0-742f36f2eb2d/33622552086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6626/4214/files/contrato_de_arrendamiento_de_habitacion_sencillo_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8521/5940/files/es_explorer_apk_cracked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8104/9288/files/binofifafejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1143/files/minecraft_apk_14.0.52.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1682/8581/files/64391486596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5002/7176/files/vipiripejidupikijebosuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5511/2096/files/vapefilulijefun.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_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 4960 bytes
SHA-256: f5637fb140bd8921a01ffe90ddc43235ab56124b321a34e14ee38453fa162637
font_01_sfnt_off00007401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 14752 bytes
SHA-256: 00fdfe9695a3325288af954f2c1822cd450288c866081f492c9eebbdbe73ca9e