Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a0da0e7e6a5f08…

MALICIOUS

PDF

79.2 KB Created: 2021-05-25 14:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad93a6aba605fc66afa46c35c48a7cfd SHA-1: 4219527947a7e88c138e8c26ed1f9e9688edb54e SHA-256: 10a0da0e7e6a5f081b25b44a17c415e0a6edec9f1dd26ec4c60878c7223d202c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing or trojan. The embedded URLs, such as 'https://gimoguvi.ru/strik?utm_term=ncert+class+7+science+book+pdf+chapter+3', are likely used to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://gimoguvi.ru/strik?utm_term=ncert+class+7+science+book+pdf+chapter+3 PDF link annotation
    • https://tajafakedebufu.weebly.com/uploads/1/3/1/4/131438499/zapofometafogu-jexewofev-famufaza.pdfIn PDF document text
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/9904427.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/nimopinanop.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/kenabuxasol-kikoku-kusojiza-wewopumu.pdfIn PDF document text
    • https://waseralubireg.weebly.com/uploads/1/3/4/6/134622629/karipifikuginet.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/2051e6c81.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/3773901.pdfIn PDF document text
    • https://gufovijer.weebly.com/uploads/1/3/5/3/135339237/timibataron_xexifikito.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/rufudoro.pdfIn PDF document text
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/fivilatupig.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/0ac8d8eb-6aba-412e-bbdf-84835e28a3d5/wirano.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/fedadawijasufazujoguvotaz.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/honey_bee_malayalam_movie_songs_maango.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/22754169230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd631f78-7c41-42af-89fa-f170640c36e1/psalms_23_niv_bible_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662f4742-34ba-4473-83ed-f725aa3401ab/35750953577.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/20890700930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5c6056-9280-4e95-8955-8a0b8db5cad7/davezanegibapudogop.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/82321053944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628304c7-92b9-4950-9445-545548291b5c/73841177843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5177d126-2b00-4ac4-8bda-4d7044090b34/how_to_be_an_essay_writer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b10dbf-ab17-49f7-befc-fb5aba06cba0/rapivewotujazirefanu.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/strike_betano_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/instagram_stories_app_for_android.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_off0000f722.bin
a3ebb6e0e86ea06df2238e34777ca2fc697dacbbf10faeb515c230ef991f80cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 5660 bytes
font_01_sfnt_off00010a68.bin
93052fd0ef127c2c25991ee45f817d7caaac78c1b76d761e2b7e9711eed8ba70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 10720 bytes

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