Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae78739ab3d325c…

MALICIOUS

PDF

47.1 KB Created: 2020-10-20 20:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: edf2b6a1a6ee14d64719341aab5901c9 SHA-1: f19ee116dfe288f23a4eee82a4ffbbe30ad00ddd SHA-256: 9ae78739ab3d325c898e47f862f584f17f4dc8fc2d0ee30284d84b713088a29c
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://ggtraff.ru/strik?keyword=dogs+with+brown+noses In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f895c3d1b84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8bd7d5a7a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f880f6070f01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f89e6d843fcf.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/6562068.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/fdabdc39-2797-4113-be64-7cd0e7ac86e3/ropebozovof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb64834-1df9-4876-b073-65a2a9cff0b7/55894329174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44906a7a-b7f8-4153-b237-748dea30a982/wonuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6f41ce-f1c7-4c37-8027-9f0167b085c6/jifibiworonum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3af973-6e19-40f0-ab79-8a01623c367e/83508760224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664a2db2-98f1-499f-80dd-ad08e412f793/sigojarolezom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165611b6-865d-4494-93ea-02eb8768af3d/solewano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e46363-c6bd-46e9-82ec-77a037ec64a2/44751456886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31857966-37a1-49ea-aa9a-7116c8955035/70053373623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6947d20-18d3-4a7a-bc05-c3dcac14f4a1/72857020405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4627/5752/files/caroline_boating_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7450/8742/files/chrome_for_android_4.0.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/jitunewagokoxulup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8783/2260/files/beginning_with_the_end_in_mind.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/dominican_republic_embassy_travel_guide.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_off00007ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 4936 bytes
SHA-256: 1252e736ee7cfa935dd4ad006e2454706c3823f90b6083f91978cc753d6e83ee
font_01_sfnt_off00008bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 10292 bytes
SHA-256: 7f277576ebcc1fb69ab0eb24dac928fdc09785e9e2927650c501ead0716508e7

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