Malicious PDF — malware analysis report

Static analysis result for SHA-256 a903b3bb3cc2e27c…

MALICIOUS

PDF

74.5 KB Created: 2021-02-21 00:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1bfc4a4928a9276a6531f604e7ea423c SHA-1: a3f4ae7970a7db16807862c92620f1b31fdf7144 SHA-256: a903b3bb3cc2e27cc27f4e4d85e59427d92c1f95695b9d8f941922d5abb8d269
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 multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. An external URI pointing to 'crophysi.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and the presence of external links are consistent with common phishing lures.

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=weber+spirit+ii+e-310+lp+outdoor+gas+grill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426547/normal_601674965d432.pdfIn PDF document text
    • http://fudasoba.iblogger.org/wusemaxabaxe.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/dividing_polynomials_worksheet_tes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_60318e371c75c.pdfIn PDF document text
    • http://vixabisob.iblogger.org/5870531568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_6026b9e177f30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456728/normal_5fceb188269e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witosef.rf.gd/android_pie_minimum_hardware_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/relative_atomic_mass_worksheet_with_answers.pdfIn PDF document text
    • http://jipowefata.epizy.com/36777966470.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/total_conquest_mod_apk_unlimited_money.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/83447415581.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/70574759903.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/desktop_wallpaper_free_hd.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/97722272420.pdfIn PDF document text
    • http://zebofazedixa.rf.gd/communication_types_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/3807102001.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_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 5672 bytes
SHA-256: e411c9de567c90b91de7b89e1718000908e3ac775177a4afff83d2242c993c6d
font_01_sfnt_off0000f735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF735 10896 bytes
SHA-256: a3808a073bd19944a4108570dda7745a9abc95583ea1fc8e934516a88d9cdc81

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