Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55689bf55dd1101…

MALICIOUS

PDF

75.0 KB Created: 2021-04-08 00:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a0cbc9a0d6e3493c406654b33ba93a17 SHA-1: af72c46d5465700fc6dcaa9fdaa7d3bef406aca2 SHA-256: d55689bf55dd110145e10d1919beb1012ead7fecbaab8fe10603571cb5db9aa7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that mimics a search query, likely to trick users into clicking it. The PDF structure and embedded content suggest it's designed to exploit user curiosity and lead them to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=what+is+a+ssa+1099+form+look+like PDF link annotation
    • http://riwotivadejud.sportsontheweb.net/74737929770.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/murachs_c_2015_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/hbhamgd/pozozifesuwujaxaxoma.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/iiii7yN/296553796.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/fipin.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/siliretuneziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowosos.myartsonline.com/kozadav.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/can_bus_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/amadeus_legendary_ncn_vn_release.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/41058526369.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/tuberculous_pleural_effusion_case_report.pdfIn PDF document text
    • http://baxewape.myartsonline.com/english_tenses_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/chrome_mod_apk_2019.pdfIn PDF document text
    • http://dazejifudora.onlinewebshop.net/auditor_general_report_1mdb.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/naxujumakipizuwale.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/nemoxixapaji.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_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 5432 bytes
SHA-256: 39914dfc4b5e74f4a08a66f5654059b3583647a376e202ba19dffda5400c8b10
font_01_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 11340 bytes
SHA-256: 48380457eb01adb427b746ac21aed3ae3416a273bade5fe5305eb9c6aac2546e

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