Malicious PDF — malware analysis report

Static analysis result for SHA-256 631e7d414d9d71df…

MALICIOUS

PDF

45.9 KB Created: 2020-10-05 05:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 02bdafc76d897e1f6fa3d04bf97090e7 SHA-1: 77a006e8cbb5c953c37662b79e35841376971ba6 SHA-256: 631e7d414d9d71df144884e21bceedd760bd077b1b471bd10a1b20178b93139c
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/pify?keyword=social+cognitive+theory+classroom+management In PDF document text
    • http://dimekoma.oscarthomassr.com/uploads/1/3/0/7/130740190/jawidon-nuzobajusiguke-moxisez-jurodelisidof.pdfIn PDF document text
    • http://tijub.new-england-marketing.com/uploads/1/3/0/7/130739756/1390851.pdfIn PDF document text
    • http://files.dcwiz.com/uploads/1/3/2/6/132682882/4e7c9.pdfIn PDF document text
    • http://files.superbfitoutgroup.com/uploads/1/3/1/8/131856602/kodevumobegumozojuno.pdfIn PDF document text
    • http://files.anniemeekmontgomery.com/uploads/1/3/1/4/131437160/vetetipufabi_finunobixuj_dikuledixam.pdfIn PDF document text
    • http://files.dungeonsanddecorations.com/uploads/1/3/2/3/132303022/1454036.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/1/0429/2601/4620/files/fullbright_texture_pack_minecraft_1.16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7791/3764/files/the_disease_of_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/sosesidav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2419/8050/files/32697039477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6679/6453/files/descendants_google_drive_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6071/8485/files/where_is_area_code_90805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/jake_the_dog_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/magic_thrown_weapons_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0298/0246/files/chinese_restaurant_in_paris_las_vegas.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_off0000755b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 5480 bytes
SHA-256: a2b42518e9ca398e9ba669b89afa7bc9be502f0211a79beb99f6092377e7e802
font_01_sfnt_off000087e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 10136 bytes
SHA-256: 9fccc0f1a4b98991fe25cf562457d1c89973f4d3e469eb41231277ca66b5b069

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