Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa04815264b6ec1e…

MALICIOUS

PDF

127.0 KB Created: 2021-06-12 15:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f9940792c5c2a39a68778edf74abc6db SHA-1: 6acad2aebe308786a4ea4d803eef3a8fb9181256 SHA-256: fa04815264b6ec1e5c6ee3418fd4a559ba6ffc9dcc01108af35b0b1d78b8455c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/pbw?utm_term=kanakadhara+stotram+lyrics+telugu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5fe84a5152da0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448094/normal_5feebc36c83b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_601b4af9394df.pdfIn PDF document text
    • https://wopebodolafov.weebly.com/uploads/1/3/2/7/132741389/dopav-lifemasilifibiz-gazukaxef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_602717ad1e0ee.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/powolizulakalotuluxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5fe24697d1112.pdfIn PDF document text
    • https://ruwefenoref.weebly.com/uploads/1/3/0/7/130739117/mowapizotobunoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_60347b9554fee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fcac79d67183.pdfIn PDF document text
    • https://fupejudesomazi.weebly.com/uploads/1/3/4/1/134108974/laguvedej_nopiwiniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_6054097066158.pdfIn PDF document text
    • https://bosagibanili.weebly.com/uploads/1/3/2/6/132682134/9edbf9.pdfIn PDF document text
    • https://likeledizu.weebly.com/uploads/1/3/5/3/135312051/lefunadoraramuv.pdfIn PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/8169548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_605f40a19fc98.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4391896/normal_60b6426f72859.pdfIn PDF document text
    • https://winupape.weebly.com/uploads/1/3/4/5/134500155/pagidowugupofig-kazof-bevovafitituz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vamafob.pbworks.com/w/file/fetch/144474747/how_to_do_lower_chest_cable_flyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35576cad-ac5e-4f23-bd17-14b6e4bdea45/what_oil_for_honda_eu3000is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adcf6d52-e0b4-4315-8846-f51cdd559d10/program_tv_remote_to_roku_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1423c482-01d1-45b0-a30e-858d8a3c399f/2007_freightliner_columbia_radio_wiring_diagram.pdfIn PDF document text
    • http://nibokuwogi.pbworks.com/f/wajet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e8dc5f-5120-4054-9cf4-ae9a10189b21/el_poder_de_la_oracion_oscar_medina_acordes.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/f/logozexovejam.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/f/teorema_de_bayes_ejemplos_resueltos_cortos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13052 5488 bytes
SHA-256: 6b66ef6dd836e69fd996ae4d9aab79489504f41923809617477f2d19b2fac475
font_01_sfnt_off000142d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D7 78068 bytes
SHA-256: f15248a7f1b6d6b831d7a339ad188674c072ee8fc4e1dc2256a97e5319f92501
font_02_sfnt_off0001cad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAD6 9444 bytes
SHA-256: 1f1719f4b8d64fe254126b3f0f52a97a002741d1683d36186428d5a40539bf1a

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