Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98399cd0c26ca15…

MALICIOUS

PDF

58.8 KB Created: 2020-10-20 01:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0b4da40dbb86ad96fb3405f4d853535c SHA-1: 6cb18e2baad0ce1bfb552d513cf41953e51dff57 SHA-256: d98399cd0c26ca1503a17d5f1cf101bf722ff20c5c31d5b865840020a8098340
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/123?keyword=eu+mercosur+agreement+pdf In PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/forevafizusaz.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/ruwoxu.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/lupota.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/povumino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5f89d1d37f7e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f8b3843b2ddf.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/1/0432/9383/5432/files/36807661575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5222/6472/files/commando_shooting_war_game_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2274/4214/files/lizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028f38d7-3ada-460a-b64a-8ab248cc3563/pelut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe815992-e2ef-4a24-b9cd-eb59e9d2a33b/26012310774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bb202f-e61e-4b3d-a752-0732f122aa3c/tufetukobuwojaluvejimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c36b679-dc6d-42cd-a3a4-6ce4f6996324/pibusumufaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be302a9-c922-43a0-8376-d5ff6a5e76ef/lusoramafamumufixurelino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892c203b-96f0-4a80-8adb-de17b458b667/jumaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff477a5-900e-497d-9a27-3313e794c165/24823578509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778a9157-a9a2-429d-8921-22c8642b4dd3/66485147817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f031533-8879-4944-99e6-b89aa836f588/vugosusewaduvalanefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a0afbb-8f92-4c34-9a37-de882c321c5f/kipeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/hodder_education_revision_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/nomenclature_and_formula_writing_worksheet_section_one_ion_names_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/74027191254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/11323223401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6506/8699/files/fight_club_marla_isnt_real.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_off00009adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 5232 bytes
SHA-256: 049084bec457c71d709b248f1287f354608858bd69bbe21cfbe8b50464438409
font_01_sfnt_off0000ac81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC81 10088 bytes
SHA-256: fb140ed9c064a9935f53a5535858a53f29ce063a8d9a2283b14ab1fbbf6b3e04
font_02_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361