Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8457abdcd9e5754…

MALICIOUS

PDF

91.8 KB Created: 2021-02-18 18:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: feaa4f0eb4c1cb70cc5b3ddef9b57d0f SHA-1: 1da98d4a064de544ffc523cc82b10f90a316bc01 SHA-256: b8457abdcd9e5754eb82fa70faf4ece074e9a58939cece2a03d9be6e1e80823b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of external URIs and the overall classification point towards a common attack pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=are+combat+rescue+officers+special+forces PDF link annotation
    • http://werenntaq.online/22966611906sh91y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5ff55a28b1b5c.pdfIn PDF document text
    • http://italysummer.fun/nafemesaxaxikuxitalabalanf9ntu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404133/normal_6004bf1b70f1b.pdfIn PDF document text
    • http://hisgohar.site/fraternity_of_the_hidden_lightqoj4i.pdfIn PDF document text
    • http://goguduve.iblogger.org/rixoreximifopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fe24482b0c44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499341/normal_600809c324133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevajaxujob.epizy.com/19501529298.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/format_jsp_code_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/fire_alarm_report_writing.pdfIn PDF document text
    • http://fujebudavitasoz.epizy.com/1392478597.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/ios_simulator_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/24650600225.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/51464817032.pdfIn PDF document text
    • http://dususawikupap.epizy.com/situpidagudulofuxidir.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/mubatenotixuzifomisev.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/radozidutadobefav.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/malachi_martin_brandon.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_off000129d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 5288 bytes
SHA-256: 938496459e1c7e05c3b3e9a9f38592fec708d1488f8dd9183be79d39f0ff935e
font_01_sfnt_off00013bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBB 11428 bytes
SHA-256: 7df79942aa7967d42ae81d73bf73423a775ed0bfd8e86c5ffe8b34f105973d84

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