Malicious PDF — malware analysis report

Static analysis result for SHA-256 682603216d5e737d…

MALICIOUS

PDF

46.3 KB Created: 2020-10-25 22:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 52967c7de92ab16b50f4ab67df49c7c6 SHA-1: a2eb7b15c1df0b1c848f227bfcad240571fb772e SHA-256: 682603216d5e737db4fcced6c28e1852f1fe08b056d37edc7fb92dbe5254f26b
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/aws?keyword=cloud+computing+security+amazon+web+service+pdf In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f8fab1a52da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f87b877c48f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/7862754523.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/lijoguwojapikilota.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/school_bus_coloring_page.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/jobiduzupimumawe.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/obesidade_infantil_e_sedentarismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1696bda4-19e6-4529-9fa8-cb7c61657f6a/wukixepukenit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ccf6e1-03e5-47cb-b6d0-4599f3dacfeb/72695083926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b448a263-084b-4905-9018-3e0a4af71e88/the_year_one_challenge_michael_matthews_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137bf3b5-2a25-483a-ba01-d48070b453ec/the_flow_on_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f8615b-772f-4b18-b54a-ff29e0172af1/widaxezinomudojozubixolur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52236ef0-e51a-470b-8a77-d45a07cef875/xasivabutalixajixerux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ff2433-802d-471d-9669-50fdc32120b8/juwezodukuruluwisisubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46f2997-fdad-408c-82f0-b2a16f5b4342/63124709197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c16111-54a4-42a5-bca1-cf1e1f611834/lalasuvowamixozeruwuzudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7578/3842/files/wusewerowusaxusulirid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/whatsapp_transparan_terbaru_2020_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2627/2415/files/bansal_classes_chemistry_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2720/0682/files/tupipekikoledezix.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_off0000726b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 5824 bytes
SHA-256: 5016fc946b96325051d457acac7a79d691183a4ec6947b8bef4c37931e00018a
font_01_sfnt_off00008648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 10980 bytes
SHA-256: a2af0d180d84d2d9c7425f036fdf41cfabca63ef91ac0ce920fd3f5e9d4f6378

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