Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1671822eed74a50…

MALICIOUS

PDF

40.9 KB Created: 2020-10-13 11:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8f5663c42cdd4f862ec3cbab6d884707 SHA-1: a2240463b12f0cac66f49780437cb4a01c0b3541 SHA-256: d1671822eed74a50f3827d8a0ec9c699acdc0cb2856c1c3438d554938af6a426
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=lol+mobile+apk+for+ios In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8347111.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://site-1039801.mozfiles.com/files/1039801/20941868897.pdfIn PDF document text
    • https://site-1043690.mozfiles.com/files/1043690/5658202613.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/76914308582.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/0925200c-641f-4a11-9dcd-1368633ad2d6/96046038272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7487f82-35d1-4070-8ac6-c10e8d5bcb0d/55109080201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0880/4007/files/patubirelitawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1897/6932/files/amish_cinnamon_rolls.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_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 5192 bytes
SHA-256: 18530b9787cbd315fa96bd69b57f285170ab8a8edb0c575c266f4b1875d67cfe
font_01_sfnt_off0000733e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733E 10580 bytes
SHA-256: 95b4ac7533540f1e54083a905b2628eb50c4127f30d7e3ee133ba5855bd8e701