Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c443677253d08b…

MALICIOUS

PDF

44.3 KB Created: 2020-10-15 22:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9f701d05508d055fdb71d7c04f678b72 SHA-1: edc3b106c99928766ebce84a8d1cde758cd51935 SHA-256: a3c443677253d08b613b0311c54f168a1e46079ee7d91833152dcdc9c9bcb1cf
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/123?keyword=peta+persebaran+fauna+di+dunia+pdf In PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/minepusu_likamilakosad_givolojamun.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/fevebixome.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/pusiwujaras.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/nanofobowiwekuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f8707600e4f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f876dfb67f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f877064b6d7f.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/vaxalapimifu.pdfIn PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/bipizusimukimadobij.pdfIn PDF document text
    • https://site-1041933.mozfiles.com/files/1041933/xexupeposotiruzawovawoven.pdfIn PDF document text
    • https://site-1040177.mozfiles.com/files/1040177/1834051169.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/1/0492/8028/6876/files/tilejapof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6325/1622/files/88604338384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2868/4212/files/best_snapchat_filters_for_selfies_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3372/5592/files/20593054013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/apk_para_pronunciar_palabras_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2191/7086/files/funciones_de_pancreas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2152/8999/files/vanemaserodemufeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ec3df7-eadd-4a4a-9167-9ad2618a90ca/95783582115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050fe8eb-833d-4cc9-a68a-f534deafe2b9/91907814556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1119c02-2c1d-4af7-8bea-f0e4de58d73e/filarinopolazepikadejegij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0104c71-5ae9-4ce2-b370-7170b73dacb5/18462834215.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_off00007022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 5144 bytes
SHA-256: c95967fbc2f6872c444b34a4f41a607a22a49fb2d639baffb0da025ce8adf177
font_01_sfnt_off0000819d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819D 9912 bytes
SHA-256: c9342df81b9337279a050ff5a3976e06c3e18934581d3c947f0b32d7084609bb