Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17fa279a884157b…

MALICIOUS

PDF

42.7 KB Created: 2020-10-27 09:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ea3071155e926a424fc9f900606c6b08 SHA-1: b6133dd1299b55be60449b6ef3fb3091e4448188 SHA-256: e17fa279a884157b3ad361dfbc1dc6407d3a8bfb5a519135aabd3f7294ca9b48
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=ek+nayi+pehchaan In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/31adeb812716.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/pivelepimudit.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/1807006.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006abb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006abb.bin)
    • https://s3.amazonaws.com/wibedubosateg/cch_chuyn_file_nh_sang_word.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/99651425200.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/ccna_routing_and_switching_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8036/6745/files/pixaloop_pro_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/fabius_plus_xl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0650/9212/files/sati_prevention_act_1987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9347/3688/files/sanemivufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/life_after_apk_obb_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/rogues_george_rr_martin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8963/2665/files/expandable_textview_android_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3118/6589/files/work_at_a_pizza_place_roblox_secrets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce82c3a-6eca-48ef-a3b2-977b6a82cd00/51840930975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e59476-5e31-46ec-81e2-88ed12910685/todowaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3c42af-f973-4066-bf5a-7442d4ae3473/podafenalabamiga.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_off00006abb.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABB 4840 bytes
SHA-256: c27e4ee3e8463c0d862f39dc32e88b068c7f8f7c69b7909b3626e4ca9fc8c70b
font_01_sfnt_off00007b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B37 10188 bytes
SHA-256: 16eaaacab85ee1a0d5d1684dd59f59922afadd962b2b44e4f1e5871c7dd1db8e