Malicious PDF — malware analysis report

Static analysis result for SHA-256 0144c0dc5e5a534a…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 15:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 85a9ee8d3214092f419db31ad724a2c8 SHA-1: 9088792a95d00be4d36f158e15a0b1de9883cc90 SHA-256: 0144c0dc5e5a534ab3c1bf9e3b2c5e722d8fed1530a30a233e9ddd2d7644562d
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, indicating a high probability of malicious intent. It contains an embedded URI pointing to 'https://xajibur.ru/strik?utm_term=fl+studio+12+free', which is likely a phishing lure for software downloads. The document body, though heavily obfuscated, contains references to software names, reinforcing the lure. No scripts were extracted, but the presence of external URIs and the overall malicious classification suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=fl+studio+12+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417309/normal_601483b5921d5.pdfIn PDF document text
    • http://gifuketedep.22web.org/rslogix_5000_software_versions.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/jasavopobonipomo.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/introduction_to_bioorganic_chemistry_and_chemical_biology_solutions_chapter_8.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/example_of_narrative_essay_about_covid_19.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/whirlpool_cabrio_he_washer_and_dryer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444356/normal_5fe444f1c1368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/spreadsheet_or_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/online_doctor_appointment_website_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/xofudawaxijotidomoki.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/zopozubax.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/ultra_street_fighter_iv_apk.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/whats_the_best_echo_dot_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/answers_in_genesis_magazine_subscription.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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 4828 bytes
SHA-256: 557231068dbfa15184c919ca127cfa9567cfc028e1418b180b4ec701c2f006f4
font_01_sfnt_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 10624 bytes
SHA-256: 772ba32703b38f75be2f87c9981f1471dde58eb5e11479c24fcfa9b6c93b9624

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