Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98beef7aff3ed61…

MALICIOUS

PDF

36.0 KB Created: 2020-10-28 18:16:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f48a0a0926f73fa3c33bc1f7f8752cc2 SHA-1: edec4593064a5f5b3c0305472e3f4afb78ef9e39 SHA-256: e98beef7aff3ed61bb17ff48bb632b6be2231fe40128eeef733e0d1080e61bc6
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/pify?keyword=58+presidential+trivia+crossword+puzzle+answers In PDF document text
    • https://zitajajelenineb.weebly.com/uploads/1/3/4/5/134512459/biwugapusizal-tijuratenofujod-nugozikukiv-jidupipipini.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/sukoxajapemofu.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/2345862.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/busikoxuw-lixiwujodopazob-vejijeba-vegavitepikalo.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/joxebovo-mokapit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f927b57be588.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/5313594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f93ba44e14cc.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/abed9d.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/lunexamotarikab.pdfIn PDF document text
    • https://jokineviraxara.weebly.com/uploads/1/3/4/2/134265776/fokolog.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004e35.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004e35.bin)
    • https://s3.amazonaws.com/fatikonavori/16456520211.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/homemade_rc_plane_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2269/4558/files/ss_s9_launcher_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/senufokep.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/como_superar_la_ansiedad_y_depresion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/kilovanawikofoxak.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_off00004e35.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E35 5492 bytes
SHA-256: 9adfb4b9906d4d5a8dd0fe8171e8594c3d950dbe1465ddaf4672269909e8ac9d
font_01_sfnt_off00006111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 9748 bytes
SHA-256: 02f174251f50842a70bdbdf614e98818e9b63660687d6df1aade350a949877ec