Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccb68f5fed39060…

MALICIOUS

PDF

40.5 KB Created: 2020-10-06 14:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 89faf8cd9a329ceadad01751df45cdc6 SHA-1: 13904b3923417801777021349fe2b023f11e8446 SHA-256: fccb68f5fed390600cce63c8169195409a385c2b662a694ff1fd54a4983a0301
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=american+anthem+textbook+answers In PDF document text
    • https://site-1038440.mozfiles.com/files/1038440/vexebad.pdfIn PDF document text
    • https://site-1038573.mozfiles.com/files/1038573/tosaweke.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/53757738358.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/20515464000.pdfIn PDF document text
    • https://site-1039360.mozfiles.com/files/1039360/nusimo.pdfIn PDF document text
    • http://files.sunriselabradors.com/uploads/1/3/1/8/131871648/5979783.pdfIn PDF document text
    • http://files.clarissafortier.com/uploads/1/3/1/8/131856427/2428468.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/29dc5729-9c0f-4482-92a9-676f5592c326/84087876882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e36a5f5-6c5f-46b1-b5b9-3df13343608e/65314187302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df105679-6488-4fee-9039-b01cc4e86716/70648483262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ae4c0d-497a-4b37-be29-4f416649fa2c/50813859210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f948da77-bc1b-43ff-a2a3-0618dfd0aefd/wibepato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8bff6a-e5ab-4f6f-bbe4-13b0ffd60d83/83606035208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1790034f-e2a4-457c-a8db-dad4ea6b0bc9/49890763549.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_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 5360 bytes
SHA-256: 026b6ac1307712e652bde40a003abe4be1a9ad2135a0546542d6cf985e31997d
font_01_sfnt_off000072e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E5 10192 bytes
SHA-256: 4381a81686d0260fb036c7797d00f030c1d1a62d78059163fb6ce75c3c8e17b7