Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1354fe589f0c874…

MALICIOUS

PDF

43.7 KB Created: 2020-10-09 21:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0f50e0ac6e0b2f89a55f7ed739d0a8ac SHA-1: 0837e0c645eca42bbf3f72595f04e5a8995160ea SHA-256: a1354fe589f0c874401e3e94ff007fba345ba9a028b52182d29eb86f71d4e2f5
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/strik?keyword=homemade+shoe+cleaner+with+baking+soda In PDF document text
    • http://files.dwightspaulding.net/uploads/1/3/1/3/131379801/7109576.pdfIn PDF document text
    • http://xopituze.jessicawelshpiano.com/uploads/1/3/0/7/130775584/9797977.pdfIn PDF document text
    • http://files.goodshepherdelc.org/uploads/1/3/1/4/131437472/f0172cb2f.pdfIn PDF document text
    • http://gejowowiz.blackwellgolf.com/uploads/1/3/1/8/131857419/60e85666.pdfIn PDF document text
    • http://redon.healthnationhk.com/uploads/1/3/0/7/130738971/filizo.pdfIn PDF document text
    • http://files.kingscartelgear.com/uploads/1/3/0/7/130775992/xupet_tuwam.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/robutupofimojoju.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/75057821181.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://uploads.strikinglycdn.com/files/0bcc2f05-9b1b-4552-8928-5ff587d8b4ce/7679981194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1f4b87-2f2c-48b2-bb31-67427c9a43a1/merunivemazodutaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ad40f2-ba36-4872-bbac-0d91cbe25e94/41979053224.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_off00005ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5400 bytes
SHA-256: 7c2bee3a7f78d49de7bc83a8d4420590be91977d6b53c7a26f04af85d9860ca5
font_01_sfnt_off00007129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7129 10120 bytes
SHA-256: 39ba58e3f2b884622475b09de541afc9a19f420f54c7eb6b20c0270b71eeb7f3
font_02_sfnt_off000093d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333