Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c12cba4c9bcc164…

MALICIOUS

PDF

45.9 KB Created: 2020-09-30 03:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e32ea68f48940bea083a3647dcaecdcf SHA-1: f246b162eb6990267edcde029710bfa186847739 SHA-256: 9c12cba4c9bcc164400a262227e7db8823cb3387162027bdab4c3b9e413f58bc
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=acordes+de+canciones+faciles+para+guitarra+pdf In PDF document text
    • http://puzimenix.myveggievan.org/uploads/1/3/1/3/131398440/sodalikip.pdfIn PDF document text
    • http://vegof.kimonoandflowers.com/uploads/1/3/1/4/131438641/dovatisazilipogedo.pdfIn PDF document text
    • http://files.crappymagic.com/uploads/1/3/1/3/131383384/535205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f7c5b3-754a-4121-91f4-de8c3b60182d/wudufuxixiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/gudexiworazapazisewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/spotify_premium_pc_gratis_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/accounting_cycle_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/kixakuforixukujudibitefof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/fogonejagekujek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6213/2635/files/gotro_bengali_movie_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/46221299053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/46964244348.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 5312 bytes
SHA-256: 3eb7ff38b698bc85fc727a08d0f5548e1c81865d82156f293f340c5ff8798462
font_01_sfnt_off000079ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 1888 bytes
SHA-256: fb837d8d2e7b6ff876074993d1faa48c00f8652074d5e7b79bdb67b3eeb562c2
font_02_sfnt_off000082c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 11576 bytes
SHA-256: d068824ca35c9cf0cbc4a2cc762a1a90de50620ab8c6f468653be1d3a9c9360b