Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f0bd0543c75b67…

MALICIOUS

PDF

39.8 KB Created: 2020-10-26 15:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5e8495d327606430e840416b95530371 SHA-1: 39b6c3c9c4d767f4d2026336b71886f1aea7897a SHA-256: d0f0bd0543c75b6735a8a840b70505a1218deddd533225856f36156d20e4bd89
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=etiologi+stomatitis+aftosa+rekuren+pdf In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8543106.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/vovadigofovexuneze.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9162425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f9298dd79c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8c7e40620c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5f92b396ad6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f91a8c853fa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f9561f9e6d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_5f954be4b85aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_5f949c1ebd288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8f761bd662d.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005000.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005000.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000083a4.bin)
    • https://cdn.shopify.com/s/files/1/0481/4503/9511/files/plaque_of_the_ergastines_khan_academy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/whatsapp_for_dual_sim_android_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0872/0547/files/border_radius_input_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1019/5107/files/amazing_run_3d_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4764/7894/files/aegisub_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1219/6005/files/naresh_technologies_core_java_material.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/apc_smart_ups_750_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9667/8301/files/nanepisumijip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/xoxukabanimugulidemetak.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_off00005000.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5000 5264 bytes
SHA-256: c2809fca2c0a2991b570c9b12b2dcbbe59ac8dd5480ef788ed1ffad42eb06537
font_01_sfnt_off000061d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 9960 bytes
SHA-256: e47aa32abb6447c17e68ac63ab4f4116d1be8de42f6495790a02fb02a679bba1
font_02_sfnt_off000083a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3