Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8248f86ba018f0d…

MALICIOUS

PDF

40.7 KB Created: 2020-10-15 05:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: be4d0368bfa6e86ec136867b73a2519d SHA-1: 2c01f0bb93d45f9d74601dc4bcd645e1f1b222f9 SHA-256: b8248f86ba018f0d0d094b4e039de58a49b0d91cccb928ec3e64d7e9485f5f64
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://gettraff.ru/pify?keyword=parallel+perpendicular+and+transversal+lines+worksheet In PDF document text
    • https://site-1039167.mozfiles.com/files/1039167/tenaratananepimezesifi.pdfIn PDF document text
    • https://site-1040000.mozfiles.com/files/1040000/34916797445.pdfIn PDF document text
    • https://site-1042279.mozfiles.com/files/1042279/19574623357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f87019f5a819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f877888c99e9.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8832719.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/dukurofosali_wopuluribop_ziwusezutaweveg.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/5109995.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/julefup-vajasiboduku.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/9251850.pdfIn PDF document text
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/3762798.pdfIn PDF document text
    • https://site-1041765.mozfiles.com/files/1041765/97727096948.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/22097763440.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://cdn.shopify.com/s/files/1/0492/3962/1788/files/ragavogare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5974/0317/files/spotify_apk_download_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9878/6971/files/prometric_testing_center_closures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/tofusibawonejuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/best_bubble_machine_amazon.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_off0000559b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x559B 5260 bytes
SHA-256: 4958cc3fdee071610e825cd0c9b8dd6f2e3f592cd18793815b62b0e501c1009f
font_01_sfnt_off00006778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 9084 bytes
SHA-256: 417ffcc33dd061e3b9bba913baf12e8896bd73357ebf23407e44d3e3d8e8e2e5
font_02_sfnt_off00008682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8682 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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