Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf5d6fed3f02ab8…

MALICIOUS

PDF

45.2 KB Created: 2020-10-01 12:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8320b0682aef6a75c74d4bb5f1aa6991 SHA-1: 3ae438c8a847907fac169dc2f2244212285129e3 SHA-256: 2cf5d6fed3f02ab8307a91906796913cbbdc76d66a3140a0f4ec2460d7ad7361
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://ggtraff.ru/strik?keyword=oxford+bible+commentary+pdf In PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/24760178121.pdfIn PDF document text
    • https://site-1038541.mozfiles.com/files/1038541/8738857720.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/kawuvavisukujopuruvixuta.pdfIn PDF document text
    • https://site-1039382.mozfiles.com/files/1039382/jatisunudefipasoraxoxof.pdfIn PDF document text
    • http://files.zhuweiying.com/uploads/1/3/1/8/131871745/6995486.pdfIn PDF document text
    • http://zoradi.rabbitholephotography.com/uploads/1/3/0/8/130814328/wogijesu_potelow_xediradun_rajumit.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/xejorerelevarajade.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/ponopomavazege.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/3026860227.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/35799653771.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/54782245328.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/10289001733.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/24428841354.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 5460 bytes
SHA-256: d9c948d5409dfebd2e3d6390e75aaff0345efb00af44890785dc4b64f01be329
font_01_sfnt_off00008618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 9916 bytes
SHA-256: 43ddc12af618e3b6da59fa4b7567a10b4ba13a0cad5f56866cf6d8277ba3ab55