Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b4526db8c05fc0…

MALICIOUS

PDF

46.1 KB Created: 2020-10-27 05:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f1393bb051959c62d128d5a4928b383c SHA-1: 1aab5e1e419c6d46221eaadc9d48c1976b120531 SHA-256: 21b4526db8c05fc0f5f72ac558f60dcb6214cc39e0d3131a9a471de8ad9c63d1
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=patrol+leaders+council+responsibilities In PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/vofozex.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/jufavaxozu_noketopapediv.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/da194e45eee.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/19e3f0691.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9333405.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006797.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006797.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009c8d.bin)
    • https://cdn.shopify.com/s/files/1/0496/7297/8585/files/yugioh_marik_voice_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8998/3136/files/amazon_app_free_download_for_android_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/30130730843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/97039827280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2363/2037/files/36407336696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf62e7fc-0749-4166-b0ab-0ec15d18c431/condor_heroes_soundtrack_1983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb1c270-d7aa-40ba-a5eb-9f0c9a5eea50/pro_ana_site_officiel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87aa8d8-a0d6-4479-87dd-912d5a1189b2/1064820633.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/vibafudovogisirodajofadij.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/12915084000.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/wokumijimokivibudonerer.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/11243398316.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/91058151515.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/willingness_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/79014255540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c62db2-a5a4-4bd7-a874-bd84cc2d29cf/98503329886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d8f0b6-f82c-4258-8d10-ada0eb85ad42/virefodilelaxorinad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a876a963-bc46-4eb7-9421-a652408117f5/15881423429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17b0895-6a04-4bda-b006-e6bb6eae433c/32817093921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda4dd50-3fe5-4cbb-bca5-cca72ac04d09/32737066377.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_off00006797.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5088 bytes
SHA-256: 38f91372f802def2f64ca5738666f01e6c61cd6253cdf4bf845d28ac2eae1f71
font_01_sfnt_off000078dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 10632 bytes
SHA-256: b5e0f90af48edfc15ebf1d65e622834ae3255ba4ac0fc2e62828276f95f5dc6d
font_02_sfnt_off00009c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3