Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f128df99f2a0efe…

MALICIOUS

PDF

75.5 KB Created: 2021-04-01 12:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6e6a19a4d64ca8c53845a2aa2059d83f SHA-1: 0f4e672735aeed858e88d6ef7f938e5f9668398b SHA-256: 1f128df99f2a0efe208eca9100ddde91f5ef2506ada96a93b16d19bc5ed488da
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. ClamAV detection and ML classification further confirm its malicious nature. The document body, though heavily obfuscated, suggests a lure related to 'old sinhala audio song free', likely to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=old+sinhala+audio+song+free PDF link annotation
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/3672201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_6063bdfa357a4.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/2Fjaihs/dajurinotunepiserizinamig.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/eighUge/bandi_youtube_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ubhg2Tz/21159185096.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/makkar_ielts_writing_task_1_2020.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/cc2caff3.pdfIn PDF document text
    • https://mutapeninudit.weebly.com/uploads/1/3/2/7/132712174/xijaxanupero-fiwuba-vepate-fiberabowezob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fe3ee042bff1.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/a124aed187a.pdfIn PDF document text
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/jikedurujiwam-xopexuduret.pdfIn PDF document text
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/bunuxovowiborarewate.pdfIn PDF document text
    • https://pixojewunut.weebly.com/uploads/1/3/2/6/132695451/nejadazawedumokero.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/vatufutixawex.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/jugefaf-nekalikidipepo-rawiwebazikuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_602af71dd7152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_605a57b57b693.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/minegikukovel/grade_1_english_first_additional_language_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/irregular_plural_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/17849921389.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/most_common_gre_words_magoosh.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_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 5196 bytes
SHA-256: ff5fc839398cf1c5478d62da021b53c6e2807b9496790a63de48869a30f22c8a
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 11464 bytes
SHA-256: 982cfeae00bb66806d931b98fd9cc55d67037919f94cb4b31eedc8affe2f2f9c

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