Malicious PDF — malware analysis report

Static analysis result for SHA-256 b014313431138a5d…

MALICIOUS

PDF

79.5 KB Created: 2021-05-31 10:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 59e0d6f16ad507bddce90dd2724de82d SHA-1: 9605b6aa3af46a66ef462e2add2a979c2f1b3796 SHA-256: b014313431138a5d445b9d7687ab2d707cbf446d3989c11b335a49b0f4dcedfe
226 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary URL, 'https://pelibifir.ru/strik?utm_term=kinemaster+pro+mod+apk+digitbin+free+download', is presented as a download for 'Kinemaster pro mod apk', a common lure for distributing malware. The presence of a 'Security software disable instruction' heuristic further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://pelibifir.ru/strik?utm_term=kinemaster+pro+mod+apk+digitbin+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5ff54c65c46d9.pdfIn PDF document text
    • https://dapobatajixafaw.weebly.com/uploads/1/3/4/3/134310280/0b60379d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_5fd9d7387bdc8.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/retugeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_601cfe5a95435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415530/normal_5ffd98db5f7d8.pdfIn PDF document text
    • https://vuduleputasi.weebly.com/uploads/1/3/4/4/134488699/6dfd1d96da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_60062fb09a065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_60135b9802324.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/f9c33031d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_602d25dd47fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_6061ffa92cac5.pdfIn PDF document text
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/ladogagafewusevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6018548de3674.pdfIn PDF document text
    • https://tulipigalid.weebly.com/uploads/1/3/4/3/134392473/zulesazetebovudubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6000bccf838ac.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/23a3b797-9a7d-4fe7-9878-0879c0333c15/amar_o_depender_audiolibro_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ee7636-f4e2-4945-9bfe-c8591e9f331e/lipodanejejozel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bded83c6-8180-4280-9ce7-47ee04e41bfe/how_much_does_genetic_testing_cost_during_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cad15f-ab45-4794-81c4-8d68c9039877/vox_ac15vr_dimensions.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_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 5628 bytes
SHA-256: f62fb05edf4b560d2e6b0172422d269cc32f537abb2ab4f304ad0e45ebb116db
font_01_sfnt_off00010260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10260 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 10960 bytes
SHA-256: 663d50cb2ca1d280db173ccd462af63788ab56e6ef1c81fef77395272c4ec70d