Malicious PDF — malware analysis report

Static analysis result for SHA-256 735a98318055487f…

MALICIOUS

PDF

68.5 KB Created: 2021-02-27 03:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 10237a4bc499900ce0b598841964a5d3 SHA-1: ae6366133474ae98df8e4927f9bd50058c6c5eb9 SHA-256: 735a98318055487fb5aa5f82734b68d6fe1dab650d7a0a101770e095520ada4e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/award?keyword=claim+evidence+reasoning+worksheet+doc PDF link annotation
    • http://streichpack.online/47193095033f5u9n.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/dYsjjgd/dungeons_x_dungeons_ffxv.pdfIn PDF document text
    • http://4escam-bot.online/allegory_definitiongvduh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60155c2231202.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/Wu1jjjd/novomagifisetan.pdfIn PDF document text
    • https://jutamuxenaritul.weebly.com/uploads/1/3/1/4/131452982/dizovisurafufagof.pdfIn PDF document text
    • http://businesslinecenter.com/80642215292rjb9j.pdfIn PDF document text
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/vaxulanopisom.pdfIn PDF document text
    • https://bijazebis.weebly.com/uploads/1/3/1/3/131382141/lanefurirakis_tasanesaniwafap_pazapef_natapulug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fee541e0029b.pdfIn PDF document text
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/8664513.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/how_to_read_the_violin_notes.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/kifiwodaramirejej.pdfIn PDF document text
    • http://prechambre.xyz/nixopokujufunuzulp7c1.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/6164483.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/vishnu_sahasranamam_names_list_in_kannada.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/dupuwuzizezajuxoporutij.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/b18f22cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489593/normal_5ff0c31f8f474.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_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 5472 bytes
SHA-256: 3cacab77ba1ed17ed269186c7bd27873457493ac82c1e96b7a1086bf47bf799f
font_01_sfnt_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 10360 bytes
SHA-256: 52bf09951fae32ff877207d98c69fb273f8d8687638749af54f69e1f489c3fc1