Malicious PDF — malware analysis report

Static analysis result for SHA-256 15423bd090c31ee7…

MALICIOUS

PDF

44.6 KB Created: 2020-10-06 14:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c4900048f95f2c67612e43fda8b99966 SHA-1: 986d4e23d485295eca7ec744e913679ab5fbcb1e SHA-256: 15423bd090c31ee78f56e6a6f6e29e9259f89bb2f4af4e8b366bd2ff33bf62e7
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://cctraff.ru/strik?keyword=awesome+god+sheet+music+pdf In PDF document text
    • http://files.oncopods.com/uploads/1/3/0/9/130969220/tozelamuga.pdfIn PDF document text
    • http://sigoja.sassypineappleshop.com/uploads/1/3/1/4/131453028/rowanulomifejajo.pdfIn PDF document text
    • http://files.humbiechurch.org/uploads/1/3/2/7/132740399/d6e9d73df269.pdfIn PDF document text
    • http://turolumu.dharmawomble.co.uk/uploads/1/3/2/7/132710770/wurafodo.pdfIn PDF document text
    • http://nididus.artisanteahut.com/uploads/1/3/1/3/131380160/b6526a778a.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/1/0479/1615/5047/files/kirilewugagek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9263/files/77673595342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/melee_guide_calamity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/71110892638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/best_thracia_776_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3256/2842/files/rdr2_wild_horses_near_blackwater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8337/8069/files/how_to_store_aloe_vera_juice_for_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb082a8a-3ba0-4e85-874e-c8c9f4848f6f/34803188876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57190f44-bffe-4242-9b46-55299c9eb2d6/pobebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69d4b84-8243-4c3f-a7b4-4f0a0c53454c/pulilefunuxupodulefa.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 5312 bytes
SHA-256: 504aeeee5dfa4498969ff5b9c9b4d6b5b89d0c9b538ca2720f5a55e86a875b93
font_01_sfnt_off000081b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 10580 bytes
SHA-256: 72825ed3977e18624ebc7f93bcfa18fae77f1585d17db3393b1497febd7df5fa

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