Malicious PDF — malware analysis report

Static analysis result for SHA-256 45590ac2e16e240b…

MALICIOUS

PDF

40.9 KB Created: 2020-10-30 02:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0bbe065e368e2d5f48c06b32fc338774 SHA-1: d9d8489f9f1e45035ea1e1120059e8ba6188a5d3 SHA-256: 45590ac2e16e240b7c68ce6bef992c9d84464905f420efec8cb0a4dac6a0d61d
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=suite+life+on+deck+lyrics In PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/migarisisov.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/f33799e532.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000628b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000628b.bin)
    • https://cdn.shopify.com/s/files/1/0497/3730/2170/files/fetip.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/vapasuripovugalaponiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4116/3926/files/nowematomivuguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7302/7224/files/binary_tree_java_implementation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf11e58-27b1-4072-9acd-9a243411f915/33101842680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0949/7496/files/filemaker_15_webdirect_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/jquery_ajax_download_from_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4748cb88-9125-45c5-8641-5f3f59656365/rapofujonetilaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8029aeb6-5043-4c4c-918c-8145240680be/zigivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/sabefazinesadatutugusiwi.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 extracted file (font_01_sfnt_off0000628b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A67 7228 bytes
SHA-256: 831f14d7bddcb262199216e8e066639cb8ef4230e3ebe446d5f86070c298b49b
font_01_sfnt_off0000628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 5076 bytes
SHA-256: ca06ccb98270a2e359415557fdcd3a30501c356322c19e60456014b0fa900040
font_02_sfnt_off000073f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 10300 bytes
SHA-256: fbd2b10732af542e269b9f0dd8c8b5a92078c410a21ae5245781f2eec506c9b9