Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aacba7311a36200…

MALICIOUS

PDF

51.5 KB Created: 2020-10-18 00:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 909240f48ab1e54b6cd1f9ec15cbf2f4 SHA-1: 4252b2671883fb7a262bf493ace80453100edbda SHA-256: 9aacba7311a36200e4e14ee2d49be7115279a32e3e2af765c3257d92472e8cf2
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/123?keyword=aplikasi+wadiah+dalam+perbankan+syariah+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f8855260d64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f8b60a23db56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f89d160d9df8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f888867024c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f8b2e3a24980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3446945-4c09-48e3-b8c8-f144940bc3d6/rimodugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a96fefc-05eb-4522-bcb3-e58989bfb66f/dikakusepolukoxusugapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e00959-7376-4970-8b47-80a87967b53d/vepogajodesapatuzod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358e4180-8383-4268-a691-9b0ec4e0a0a2/30016584606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31db9fd6-e584-4a22-878d-bcfde2e8daec/cenova_kamera_izleme_program_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/online_annotator_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8081/0136/files/33030470694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/fizavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9159/8754/files/in_your_wake_expression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d53ea2-5464-4ad5-a4b2-fc263a109b30/que_son_las_odas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8678da-506c-4e85-a74e-97f0cfa7f334/letom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e44d89-c347-4f79-97af-2a2d4b0e8c65/72773809179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f3d658-928a-43b9-8b69-19f9df961441/nuzimuxosugojebogivor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9578/8194/files/oru_kuppai_kathai_movie_online_streaming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/the_power_of_vulnerability.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009fd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9FD7 19068 bytes
SHA-256: 5374ed7811ce69b2f1b99cfd4816b01160850004dd0bbf5e4015902bf3b6ec4f
font_00_sfnt_off00006b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 5668 bytes
SHA-256: 95383138f549d1b144960c27fa1aee4c337c84c0010f597f3aaac3a22b7c686d
font_01_sfnt_off00007e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 9680 bytes
SHA-256: 9fc658b8cdb001edba8cb34fd687371270d09ef4197dda5aced0f5f7c6bc0d8b