Malicious PDF — malware analysis report

Static analysis result for SHA-256 99517d16524fb6eb…

MALICIOUS

PDF

71.0 KB Created: 2021-02-19 15:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e7d4e2b1fa17f3c8a728674a0bde5e29 SHA-1: 244b639374f13f1c69f24d75787a9ca5f6147585 SHA-256: 99517d16524fb6ebc0d3ab0a1429cc2b7523d5163084ccc1b768f8c6e91d8bb9
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/123?utm_term=how+to+apply+cricut+vinyl+decal+to+car+window PDF link annotation
    • http://tomandbxof.site/mdat_gog_reporting_area4xy6u.pdfIn PDF document text
    • http://mugaset.22web.org/gixixusiku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5ff8d69bc039e.pdfIn PDF document text
    • http://yarrebitteh.online/cheap_wedding_cake_bakery_near_mebnwtg.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/jimutaror-pifom-lupitulikufoxi-givapeku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426812/normal_5fecf4fda7d37.pdfIn PDF document text
    • http://construt.site/behold_a_pale_horse_movie36vke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5fe14bd782ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_602f6411f22d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_60137bf397669.pdfIn PDF document text
    • http://podarokinsta.site/babivupizitivupulx6o92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_6023d3f3a8873.pdfIn PDF document text
    • http://yognat.space/zombie_apocalypse_moviedhix5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_602de7e0f019e.pdfIn PDF document text
    • http://damvglaz2.xyz/aura_o_las_violetas_libro_completouhvez.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_off0000d7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D2 5104 bytes
SHA-256: 5b5abfe5abd987ab39b587ea860863b1f95e22dff9b13ef82f5079501dac1fb0
font_01_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 11180 bytes
SHA-256: 4202df1f95f50d6f44227a3f3003599ead5563c8d4fca7864d64ea2e0b2a36e9