Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc377cd8a3744dc0…

MALICIOUS

PDF

43.3 KB Created: 2020-11-09 11:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7379902f500c531e62f60bf6bde95e95 SHA-1: b23aa8f539cfc3ae995fc8d8833f69bdc279f9ab SHA-256: bc377cd8a3744dc09a1dbe236a464da0c83469a0805ab3b1bae4445cfd0451d8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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://trafficel.ru/aws?keyword=silverthorn+human+physiology+pdf PDF link annotation
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/087b9b.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/49fe2ff61128.pdfIn PDF document text
    • https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/bobuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f894aa7c8cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f8e8fac49e66.pdfIn PDF document text
    • https://kosemarenile.weebly.com/uploads/1/3/4/3/134315061/8760864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f92076b370b2.pdfIn PDF document text
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/gexavite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5f95aa3c2efbe.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8264588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fa1d011e2bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f9157fb12177.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/kujupaxadomifuti.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/0ea66cef-fbe5-4977-b83c-b97dce19ae4c/nevada_grant_deed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071e13bd-64fe-426b-b681-bca73f08ab2c/ritagofusikivolinuratezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f683ee-f0df-4d23-8888-aac50b0d98e8/black_shuffler_gamefowl_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a12ce2e-07f5-44f2-a34d-388f959c3943/5603860547.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_off00006a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 5720 bytes
SHA-256: 3f6b3cad152f2d3634b71e7ffa76a72c7dc5828253c7003ff55765f0775584dd
font_01_sfnt_off00007d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D76 10092 bytes
SHA-256: 7fa446ea0b0adbaaba0a9c6f946f5890ef24ad34a108aa1e0314d079cceada98

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