Malicious PDF — malware analysis report

Static analysis result for SHA-256 d776b6779974ecae…

MALICIOUS

PDF

39.7 KB Created: 2020-10-26 11:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9fb798ee76c72f54da007781138795c0 SHA-1: c21ba637ebe84add738fa40d88a1fb681f177bdc SHA-256: d776b6779974ecae8f10b0eeb572df8889528afe4a45dc105eaaabbf3f61a01b
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/aws?keyword=evermotion+archinteriors+vol+36+pdf In PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/vuxidexepala.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/sitome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f93fd3535148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f8ebd3c579a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5f9583b2e6622.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/8406594.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/8624298.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/651409.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000586e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000586e.bin)
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/84122840430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7183/8643/files/61193295156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7104/5277/files/simixunajeruzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2417/7093/files/zamzar_to_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1264/2757/files/water_resistant_50m_watch_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3732/6997/files/transactional_theories_of_leadership.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6433/0913/files/59368584796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2360/5153/files/arvore_de_natal_petroleo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/fegagatonafov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1091/4969/files/volos_guide_to_monsters.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_00_sfnt_off0000586e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000586e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586E 5728 bytes
SHA-256: 63ae2fa7253c7fc7eea7174de47579e7e52c6363dc9661fc5b631fc77cba6405
font_01_sfnt_off00006bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 11100 bytes
SHA-256: 5e598c057c75110dfe9a7d9b8afc1de74cc1e5b270b1353d6f4d0e283be2dbad