Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe8e0066bf80fe1…

MALICIOUS

PDF

80.1 KB Created: 2021-05-20 21:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 04af0568756229369fc1ff3fc99adf86 SHA-1: 2b499217e18e9bb80f4b5d6324cc5d6ee46a741e SHA-256: 3fe8e0066bf80fe1249cb70a014f2e73a57a36ddae352c8cd0176a390c8d0190
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content distribution scheme, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the presence of numerous external links. The primary malicious URL identified is https://nipisod.ru/strik?utm_term=padman+full+movie+download+pagalmovies, which is likely used to redirect users to harmful content. The ML classifier and ClamAV detection further support the malicious nature of this file.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/strik?utm_term=padman+full+movie+download+pagalmovies PDF link annotation
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/vazebitulepekekan.pdfIn PDF document text
    • https://leponinidokawe.weebly.com/uploads/1/3/4/5/134502666/davilipil.pdfIn PDF document text
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/fb5aca50fdb941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_602073fd20045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_60157fc855abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fe80c9155f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_6063502489ecb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371524/normal_5ffc0dbf1de28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_60530dfe542bb.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/921bf1bc-6acc-4a97-8c3e-9a69c2a286a8/71028650803.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/merijetokajikolabusak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd250eb-effc-4461-8a82-2c0b54e98f43/tomoledejiduwagurokigidi.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/81453706262.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/appvn_app_old_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63726020-9d2b-4322-a3bb-86557c4b8100/how_do_you_know_if_a_sprinkler_solenoid_is_bad.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/8782336610.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/audacity_record_computer_audio_no_microphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a606128-92dc-4347-8929-779db2384f09/mechanical_engineering_graduate_jobs_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/gowadiv.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_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 5420 bytes
SHA-256: 81b4a233422cbb54beaa3130f88eabac6eaa1dd007e7ddfe4c1b9f3d24200e39
font_01_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 10732 bytes
SHA-256: c19042391f11a829ca5a76949ff87cb7ce29a316435d0d327374eb88ef7c9569

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