Malicious PDF — malware analysis report

Static analysis result for SHA-256 869a27657012446e…

MALICIOUS

PDF

43.1 KB Created: 2020-10-02 20:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c8f1bbe9d7d463cdd6fe910d26bcb0e0 SHA-1: 26188a86255099d52420dbd8442f1d2078f7951d SHA-256: 869a27657012446ea1de6d5763c6c1c2568afa72cb8829785c2396c9094cc200
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=how+to+report+intraclass+correlation+coefficient+apa In PDF document text
    • http://lomewewi.middleforkimw.org/uploads/1/3/1/4/131482975/zurobonawenuxazu.pdfIn PDF document text
    • http://files.morgan-lindsey.com/uploads/1/3/0/8/130874529/sikudatu.pdfIn PDF document text
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdfIn PDF document text
    • http://files.nevadadiscoveryride.com/uploads/1/3/0/7/130776015/livuwifamijeregedapi.pdfIn PDF document text
    • http://files.karenpmorrison.com/uploads/1/3/1/4/131409693/bowabibebizulaw-gexitub-mevifalotezun-ziwulazi.pdfIn PDF document text
    • http://fosew.lindyphysicaltherapy.com/uploads/1/3/2/6/132695550/8678130.pdfIn PDF document text
    • http://sajega.asaanalytics.com/uploads/1/3/2/7/132710714/5490968.pdfIn PDF document text
    • http://files.sunburysandlotcamps.com/uploads/1/3/1/1/131164081/xogatasajo_sopapi.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/1/0438/2870/7485/files/40194289488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/82977146250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9280/7332/files/super_bowl_prop_bet_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8337/8069/files/falling_slowly_take_this_sinking_boat_and_point_it_home_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3673/7177/files/nespresso_vertuoline_gca1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9551/0171/files/zavivevuvuvafabudukamaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2433/5003/files/lefubenoriparit.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_off00006a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5064 bytes
SHA-256: d2b3f638ab0e6a29138bcb9bdf223a3727d88b7d8c16dd3ea50435c38710155d
font_01_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 10164 bytes
SHA-256: a3cc82b2f2dd60b1224d5397792146b903970f1e32fff71ca31b49a74a998203

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