Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a75ede6dc70ac1…

MALICIOUS

PDF

44.3 KB Created: 2020-11-01 17:30:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd41289fdea6e3e899cf99daf0ccde93 SHA-1: 31e0bf0ba32256d5bf2587e2559576391880cd85 SHA-256: 72a75ede6dc70ac1b620b4b4d9362d8fcc526cac074755fb9477310dc47208e1
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/123?keyword=devil+may+cry+2+trophy+guide In PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/pukinefa_gelukekazivi_sotabimerekimo_basanijiwib.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/pomukeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f8fdd5bed0f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4217/5641/files/killer_chess_tactics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/upload_apk_to_amazon_app_store.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6686/6843/files/next_season_of_girlfriends_guide_to_divorce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/pulaski_bedroom_furniture.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/body_boss_ultimate_body_fitness_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6907/7173/files/70028442282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b342e75a-1826-4856-81a9-d65b77147fb6/magarutatinoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7559/1074/files/list_of_west_african_countries.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/16747287315.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC6 5604 bytes
SHA-256: 09399143542a8c23113726ad286e79d9dfaae12412972e4f2af4234858698956
font_01_sfnt_off000081b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B7 10188 bytes
SHA-256: d7d7c4829f9401be03a0f3af3c8fe95a0b02dbe1c993f6605becf4ab35991595