Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e1c18283eafc82…

MALICIOUS

PDF

40.1 KB Created: 2020-10-25 14:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 4f0396efe20609b55e43b07e6dcd8cf7 SHA-1: 21e80bd4e0d5fe2b9284a3db147e71b9f77004ef SHA-256: 78e1c18283eafc820f27587ec7f71a7cf3f032938af3825681ef38a23321fc92
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=aadu+valarpu+in+tamil+pdf In PDF document text
    • https://xapawijumoj.weebly.com/uploads/1/3/1/3/131379373/3125402.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/887661.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/63fb1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5221/8541/files/antimicrobial_susceptibility_testing_clsi_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/miwalisowewodifoduxozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/97905579468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3759/1205/files/best_free_offline_gps_navigation_apps_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6189/9171/files/ekornes_stressless_sofa_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/comment_installer_une_camra_de_surveillance_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fbe3bb-f750-4ee9-8cf0-e7721643d620/42284812801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2eefb49-4bb8-428c-9106-a063e33a719d/85444593155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab693da1-82d5-4c62-82ad-3349448fde37/tewofenudenujemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cf5f01-4c39-4784-8f03-fc97b115e15e/craft_contingent_spell_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f63a01d-cdde-4c18-917b-f147c978a0d2/xovubowefipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1367e2ab-1f61-4a68-88a3-d83ee8e6d489/zarojavizodijavuvijufar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1a201a-b90d-44d4-9a44-bdc85a17a811/kurabokugud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef984a5d-fdfc-424b-858f-a83463dbcc51/zedibubojumabagogolure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0201cbad-2a37-4c7e-b56f-41c948346d98/zobusogutotuvuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7569/4492/files/koraxukajegenimitatifaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/hyster_forklift_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0255/0174/files/pillowfort_play_house_tent_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5822/0187/files/lunoroxamikumenipojisugez.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_off00005191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5191 4712 bytes
SHA-256: c70ad20655c372ff41fa267413569037845f6816c902f0c9d5458dcd8589feaa
font_01_sfnt_off0000616a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 10040 bytes
SHA-256: c26517e1798da39b8a47f88eb39fa1fdd323152b2ace6a052936aa337f21f447
font_02_sfnt_off0000835c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3