Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4219e1c55cd79e…

MALICIOUS

PDF

50.4 KB Created: 2020-10-02 11:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bb74c0741c1cf44eec60926d514b8d54 SHA-1: 688eeb225d6c19a05ed3f7c2a38a10c03261518c SHA-256: cf4219e1c55cd79e22b97a6d95070c9a5b57954e8e334bf47adb14d961215957
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://gettraff.ru/strik?keyword=ihascupquake+minecraft+oasis+map+dow In PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/safamilededovutorilabat.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/71435749217.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/natoxowuv.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/beleliminiwegip.pdfIn PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/nifowuve.pdfIn PDF document text
    • https://site-1039731.mozfiles.com/files/1039731/98695258359.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/wikexadunutasotuvekulef.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/35781931634.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/vinufomumudogilenujotew.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/bawojanoroluzejudujupo.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/zukodevavelapatezapug.pdfIn PDF document text
    • https://site-1040794.mozfiles.com/files/1040794/rowuseji.pdfIn PDF document text
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.pdfIn PDF document text
    • http://files.jj-recruiting.com/uploads/1/3/0/8/130874110/xisirol.pdfIn PDF document text
    • http://files.blissbeautybasement.com/uploads/1/3/1/3/131381681/betagupukozubuw_xiwebet_pawizaj.pdfIn PDF document text
    • http://files.songcatchersworkshop.com/uploads/1/3/2/6/132695519/silibizora_noxulij.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_off000085d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D6 5584 bytes
SHA-256: 60b55166e1822beec292cb7879a1b68badbc191a2ee0174e4cfb6ae7b276b4d0
font_01_sfnt_off000098b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B9 10452 bytes
SHA-256: ae055ff73b72fe301dc9e22545642c815ce49be4a3c75070eb689f6ed3e8d105