Malicious PDF — malware analysis report

Static analysis result for SHA-256 1772452e77ff8020…

MALICIOUS

PDF

71.9 KB Created: 2021-02-15 19:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4d32bb161bb458029025497dd433bbbe SHA-1: dd0d0eb674b97473b0cb514724417aec390429c0 SHA-256: 1772452e77ff8020dd8ccd3ce53cefeb4d82c1199b3fbb5f61e94b94c15dda38
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://crophysi.ru/strik?utm_term=mini+dvd+player+for+mac', which is likely a lure to a malicious site. The document body, though heavily obfuscated, contains text related to 'Mini dvd player for mac', reinforcing the lure. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware distribution attempt.

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://crophysi.ru/strik?utm_term=mini+dvd+player+for+mac PDF link annotation
    • https://cdn.sqhk.co/xitilesuxiw/jjgjcoF/vuwuzesikumejafogisobaz.pdfIn PDF document text
    • http://copyrightshelpcenter.com/1593774055401tx6.pdfIn PDF document text
    • http://natlab.ru/grbl_g-_code_motion_controldqh4s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423453/normal_5fc70c899b3cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5ffa99e0b0ca1.pdfIn PDF document text
    • http://timecodes.net/algebraic_expressions_problems_and_answersyf4v5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5fe446da83ba0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444353/normal_5ff457dc97927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501356/normal_6000bb1e2e54b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mufukep/break_even_point_questions.pdfIn PDF document text
    • http://fakodesugi.epizy.com/tahoe_boat_trailer_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/executive_summary_sample_for_construction_project_report.pdfIn PDF document text
    • http://solujenujaki.epizy.com/the_argonauts_maggie_nelson_free.pdfIn PDF document text
    • http://tebaxisabajix.rf.gd/simple_length_conversion_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/6381037979.pdfIn PDF document text
    • http://jotigosi.epizy.com/wovatudinilabatobilaj.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/gobopojofipigozelanaret.pdfIn PDF document text
    • http://veziledijiv.rf.gd/app_android_tv_romania.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_off0000cfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAF 4996 bytes
SHA-256: c9908973bb37af97735753ba9f089e99779dfccd8286a5cb3b849a6e386f3e9b
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 10484 bytes
SHA-256: 415c3db9af38a907363ad7352c41b13f104fae7a2c8f705aa3133be0dac7319c
font_02_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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