Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f5442eed770669…

MALICIOUS

PDF

79.3 KB Created: 2021-04-09 10:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1571a66a19cd9f83c5a22e4fa3d502ff SHA-1: 516d10b31d7c5a7d1b56afb1b237cbae776e3f61 SHA-256: e8f5442eed770669a6b206e8b911a4b74bab82c87f8ea0dd412b85bd0c480a05
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=nixon+brand+watches+review PDF link annotation
    • http://xujaxul.mywebcommunity.org/96402371984.pdfIn PDF document text
    • http://bisapusid.mypressonline.com/pdf_password_cracker_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5ff1b8a273471.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/2fbbf7.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/dowizepabod-morejuwovebanib.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/gusajefejadukogex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_601d71f278194.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/39999705902.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/how_to_turn_off_alarm_on_timex_1440_sports_watch_wr50m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/xuwejukad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6140bf9c-07c2-4a44-94a6-775700287a32/waxomopajixob.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/xajajogunajekiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9167c11f-dade-45cd-9f11-978457b15a9c/how_to_reset_snap_on_solus_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/venixejazevedidis.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_668133d15202457dab33abbcdceb44e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/lazinuzageve.pdfIn PDF document text
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_cae0eae877c449aabb3b170649d03aa8.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_b52b5b0b9b1f4aedb8298439aa9bc610.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/47646746914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d82f0f4-e790-4a3a-b126-b2d94af6924b/how_much_is_usps_media_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f00229-5fac-469b-a447-1a37faf7a9de/what_does_the_bible_say_about_following_mans_laws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bc165b-d0fc-4c97-b0e1-f2edfb7c6b5b/kejitovulumatofesof.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_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 5324 bytes
SHA-256: e5016a3f2ab547f0fe8fbc035ac50217e0c589dc23daea33441be52b80120dd6
font_01_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 10984 bytes
SHA-256: 6443f6c996034a2d9abd42b38dcb98bb06d03876c904a69b3362243259b54c6b

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