Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecbe4f67fb14a74…

MALICIOUS

PDF

42.8 KB Created: 2020-10-06 22:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4dac2ea5b9f14a728f83579f5f63ac95 SHA-1: e5d770b1ac3cd575ae742674f82c260be91b3254 SHA-256: 8ecbe4f67fb14a74c2a2e09da648a19178604580967f63ada47648b4b5591849
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://gettraff.ru/strik?keyword=anime+beelzebub+sub+indo+720p+batch In PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/28294538860.pdfIn PDF document text
    • https://site-1038477.mozfiles.com/files/1038477/87154622978.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/7227678112.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/83795021227.pdfIn PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/10654734642.pdfIn PDF document text
    • http://files.barrons-teams.com/uploads/1/3/2/6/132681698/netevawosupij_webajiz_tizidolewam_safefar.pdfIn PDF document text
    • http://xorefigo.robingibsonart.com/uploads/1/3/0/8/130874330/6836490.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/1/0433/8476/6620/files/kedeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/13467899976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/51626313892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/sapulpa_high_school_softball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/mini_militia_apk_download_pro_pack.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_off00005b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B00 5632 bytes
SHA-256: 5fe5e1539d900c3e85677e305c66bc4faad2837eb015e2cf6a3bf3a1afbbe007
font_01_sfnt_off00006dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 10120 bytes
SHA-256: 3eea2d414aad02eb4e37fb65549db8e8e9f7d0aea71ba658b3427513bc8e2683
font_02_sfnt_off0000909e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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