Malicious PDF — malware analysis report

Static analysis result for SHA-256 5368564bf0b99261…

MALICIOUS

PDF

47.3 KB Created: 2020-11-09 15:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d087385aa2bc25b44a91665d3023f37b SHA-1: 5d220a729361b719ae4097f6021f610ff984e8f2 SHA-256: 5368564bf0b992618ae8fff9be1c5d07ac975292f32182d589ed00a25d953d98
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=on+the+road+plot+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468563/normal_5fa703fb36fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f8e98a568847.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/bejiludusugixite.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/5d087378324163d.pdfIn PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/a3fbee2717.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5036761.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/9c1bd87f-608d-482f-82bc-aba9794760b8/72482283534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3bbc7ef-4e8a-4ded-8f43-04966dcc4314/robotie_giri_ders_notlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8817eff6-b3bf-47dd-940c-a7cb932c65bc/passive_voice_bi_tp.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/4545740298.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/formasi_cpns_kab_bandung_barat_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7da1160-a221-4a61-bb25-e50cf0740633/wovebevugukomis.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/p2p4u_ufc_live_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0555fd1f-e5d0-48b9-b0d7-0d86282575ee/92939328028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a8335b-e667-4085-ade9-abeb5fef02d5/denotation_and_connotation_worksheet_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/answering_the_call_candidacy_guidebook.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_off00007bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 5328 bytes
SHA-256: 7b65a6c5d3b038bbae208499851fa32cb39d146837af0873229e26ec07c5f27e
font_01_sfnt_off00008db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 10848 bytes
SHA-256: 9f34371fff3cb6269f1cf24cd2d735f20ed7ead81c0fab81aa5988dad7060b31

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