Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33c711e3ba95886…

MALICIOUS

PDF

129.3 KB Created: 2021-04-03 19:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3842db7ea04db63a25d09803e37317f5 SHA-1: 20432ccaae281ef1150a6f50be57a20fc40b13ce SHA-256: b33c711e3ba95886517cf480bd2f4873bfe14ae257319ec61d7a41da17c33db0
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by an ML classifier and exhibits characteristics of an advance-fee scam. It contains numerous external links, suggesting a link farm designed to redirect users to potentially malicious sites. The document's structure and content, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, strongly point towards a fraudulent scheme involving prizes or deliveries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jottigo.ru/wix?keyword=lori+mckenna+canton+town+club PDF link annotation
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/d44b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fe892a57ee48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_604d35879657e.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/8b56b33457a68f.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/saromelikitikefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_6017182a62419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_6044917a723d7.pdfIn PDF document text
    • https://lavulujataj.weebly.com/uploads/1/3/4/5/134576306/15f87ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5fec1b2db154d.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/dutimafutire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_6003ae413d9a5.pdfIn PDF document text
    • https://berarenojinoz.weebly.com/uploads/1/3/4/7/134737003/0f123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_602aad544935e.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/kubaz_wepudozapiwif_tatulazo.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/wadugavoja.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/08856159-63e8-43c9-9cdb-eeaf46995438/15927780401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e76cff6-aab6-45fe-9835-634d4222fa2c/manual_de_tcnicas_y_terapias_cognitivo_conductuales_uned.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657c1c3a-e410-40cc-9d3d-0c8bd538a5df/rival_20_qt_roaster_oven_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f2cff3-2995-4b6e-b4c0-937b6f2c4c6a/jesegujusesatek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9d3e92-e8d4-451b-b40c-4f2a930ccd56/the_dark_prophecy_trilogy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5ff42b-35db-455f-90af-3f4a00f8fdcd/remem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf86b587-8ee9-4bd8-ad47-0fee24334ba4/how_do_i_fix_my_nespresso_vertuoline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f39a235-1595-4343-ad0a-5b378caa4be3/how_many_chapters_in_the_tattooist_of_auschwitz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e781009-12ca-4cf1-afcb-d5b580c9315a/1100712988.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_off0001bdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDD9 5004 bytes
SHA-256: eb03f955d112cae2acfff1127c8b9ec44853e95fd32b7f12c7a9d3124e163ac1
font_01_sfnt_off0001cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEE2 11460 bytes
SHA-256: 89967585d517380bdbd9ebbacea34a6ba7660e78d299c4baf96ec7fceea13f08

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