Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a199d9a2f5bd4b…

MALICIOUS

PDF

78.6 KB Created: 2021-03-01 10:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3590904e807d352a88a67234d934041d SHA-1: e8efcd0466048d02759b8a9fc8cf232aa0385546 SHA-256: 17a199d9a2f5bd4b1215daa9295ce36b71d82eae2acd33bfc605cfae7496f4f9
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by heuristics and ClamAV. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading an application. The primary malicious URL is https://jumiwimov.ru/wix?keyword=apk+xhubs+2.8.6.5, which is likely used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=apk+xhubs+2.8.6.5 PDF link annotation
    • https://cdn.sqhk.co/waxolulum/aLhgbji/vifikat.pdfIn PDF document text
    • http://1xbet-registr.site/thunderstruck_free_mp3_downloado3pgo.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/PligBhY/58407956640.pdfIn PDF document text
    • http://wordwild-store.com/753654838011nm9p.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/4ha5hja/9279130572.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/Cshc0jd/trackitt_485_eb1c.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/Nhd0Rie/yeast_infection_symptoms_in_stomach.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/igfZ4gj/reveziretolitiwuvozolaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/5je1Beo/top_100_nfl_quarterbacks_2019.pdfIn PDF document text
    • http://%s:%d/%sIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/20254629260.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/probation_evaluation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/rizinuziruxitutetukazov.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/stay_rihanna_piano_chords_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/adobe_acrobat_reader_for_android_apkpure.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 5464 bytes
SHA-256: 6c7b4c139179c9b6f1a7ab12b79f877403b9e4b303547a516e5e97ad0b17bbec
font_01_sfnt_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 13912 bytes
SHA-256: b50b8cdfaf8205be0da556a4f71ba5476ae3e75a584b14223497c0ff0e1faba4
font_02_sfnt_off0001189e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189E 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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