Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4d33582b970864…

MALICIOUS

PDF

45.3 KB Created: 2020-10-23 20:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 1442dc85317378a35f4fdcee020c877d SHA-1: 0d874e817a83d1cbf141d55f9e637f49158ab200 SHA-256: 5c4d33582b970864db0c59358dac472295646c24f9faa6d1cb5870f49d26e653
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://ggtraff.ru/aws?keyword=amenagement+du+territoire+au+senegal+pdf In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ec8bab5.pdfIn PDF document text
    • https://goxezojukaruvuk.weebly.com/uploads/1/3/4/0/134000107/narutof.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bojaseweku-dawanili-demaronesapoja-defokutuzigezo.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/1/0268/7477/3694/files/multi_step_equations_pyramid_puzzle_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0795/7400/files/apk_mirror_pokemon_go_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9808/8628/files/12950460599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3989/9039/files/tupudivasifir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3595/0743/files/44285874126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f96a02-dc5b-4abd-ba50-88b14255b61c/leliganoxufozuvuxogifijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f70342b-db42-46e9-acb3-5bff2d73db9c/69618735943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6779744e-8bc3-4138-a39f-b6aa42e2aff6/45970687568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defeacc3-1c61-44ed-9162-c5a031fb0987/the_art_of_problem_solving_in_physic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404c7494-e6eb-4c75-864d-fb47b7482e94/80883788951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a610b23-9d30-444e-9f57-427a6c884897/66982483594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/scratch_photo_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/download_iphone_x_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8738/3714/files/comentarios_biblicos_john_macarthur.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/basel_3_full.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/4124855262.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_off00006bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 5348 bytes
SHA-256: 393c5a41ee06f9c9a208f2690ef1baee700f601535b0446699185251dee4464d
font_01_sfnt_off00007de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE2 12828 bytes
SHA-256: e169b8e18428974e2bb9780ea97bc382545694d1b32172bc6445f997db145cd4

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