Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26feb65870b957c…

MALICIOUS

PDF

45.7 KB Created: 2020-10-17 23:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aed4e4937b5a1e7f7669d6a638b7c611 SHA-1: c556d9e11243a971dfbecb8b1787d0d4d0df0307 SHA-256: f26feb65870b957c55dd41d3327bd3307eb08b5235224424e897aceb986b80b7
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://ttraff.me/123?keyword=intro+maker+for+youtube+vip+unlocked+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8afb2426e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8975d9955b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8a562c38df5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87c63baed51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f896250ee63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f880d8f910b9.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/larum.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/rative.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/vuzakikowuz.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/jelekedabit-gubelopu-zetemigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/disagojekazekoxexevos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/rokefuratasogeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1749/0591/files/rujawojixixamumaledasazus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/13652379422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3374/3519/files/frankenstein_comprehension_check_questions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/jufaselofegazadalufulop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4488/3608/files/application_closing_date_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/banotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3931/5880/files/tucson_2020_manual_olx_rj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c0c6a8-afe6-4580-aed3-933df93960da/80178147233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959619e4-cdf5-4661-b6fe-c0890c96e21f/65868933235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29841b48-dba7-4f04-975d-af77753cd44f/50370737363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153787c7-8c12-4c06-8b35-59250a4024e5/pujibipesapefuvubixupube.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_off000072fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 5428 bytes
SHA-256: 37af09a5d212890a456326129595895876aa3ba89b0ed535f49ad467dd85464c
font_01_sfnt_off0000855b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855B 10520 bytes
SHA-256: 6c62831b8fc00545d8f7e9f4c0d16d856eb7f2102b5c9501a96acaaadc5c421c