Malicious PDF — malware analysis report

Static analysis result for SHA-256 d349d34e0184ae5f…

MALICIOUS

PDF

48.7 KB Created: 2020-11-06 06:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ce1615abe4aa959c8dd37c0007246d2b SHA-1: 7a84dce3edf55d14adc3734e177cc989f7e5b3b9 SHA-256: d349d34e0184ae5f4a84771d1a48e27c854e5956d3869cbec773e5057a77960d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=kaspersky+antivirus+activation+code+install PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8f5b6fcd78c.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9678319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_5fa424a56c2a4.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://uploads.strikinglycdn.com/files/bff4741a-e788-4a99-bc9c-6962cb74dc68/delatabisibagumopamek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a7dabd-20b0-4161-8f47-e44b4e1e540e/pezutajisuserikudugomeze.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/buloraberafoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95375b6-bf57-4d56-9a9f-21859879e00c/kowixuxaxukiserinoki.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/odessa_texas_warrant_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70c6e16-a91e-4c8f-bd2e-9c6da5b6ba32/77811676220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b534aefc-01a9-4317-a887-95620afb7f63/collin_resultime_temizleyici.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ca98e7-4b14-4620-812f-76f4d794be43/brazil_song_dhol_mix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35fefae-3e9a-4be6-a135-ce9f8df6ac6b/lasogefivukavekalurapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c312be-daaa-43b4-be1d-53986bcd3fcd/wevinimata.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_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 5144 bytes
SHA-256: 54bce654a8d9f9179b771b75fee355cdab829ad57930dcc5e1a137fab448395e
font_01_sfnt_off0000822f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822F 10856 bytes
SHA-256: 68fe355c3c3c73da4b2c27860e6f128db6283e758119e9b128b4054031c6d89e
font_02_sfnt_off0000a74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA74A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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