Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ab0360f4bd42a7…

MALICIOUS

PDF

79.9 KB Created: 2021-01-31 09:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72961109309f5ba0e536c6900a664230 SHA-1: 4a227b0402327e7a1c9aafdd562dc5286b391acb SHA-256: b6ab0360f4bd42a789b80e221fc16394efe4a084919c14503319668a7680c4e0
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 pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to HP Chromebooks and Android apps, suggesting a phishing or social engineering attack.

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://jottigo.ru/aws?utm_term=hp+chromebook+14+g4+android+apps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419003/normal_6010ce8b0ec5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404984/normal_5fe0fcc19cf03.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/jijhjic/lizeraverenuzeximusutak.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/ludevovoduvibosadipejur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_5fe66095b8f1a.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/cggBtja/82330765737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_600263f251a2a.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/jfoflja/audio_setup_wizard_adobe_connect.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/3hfuKtJ/ducati_v4_engine_sound.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_60070357aff9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_600fcd32bd2dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_6003bd24275e0.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/futamo/75030303392.pdfIn PDF document text
    • http://lamupilabixekuw.epizy.com/73995220826.pdfIn PDF document text
    • http://fugewep.rf.gd/netflix_app_android_8.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/39502047415.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/codeigniter_admin_panel_template_github.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/uscis_forms_for_spouse.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/kikutugaxegojit.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/zixezexapim.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/vavil.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_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 5760 bytes
SHA-256: d3f91475d6aadb6c189d579fc90d6d2fb6d24f960c1fdf1b5d6c189bc32fb141
font_01_sfnt_off0001091b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091B 12256 bytes
SHA-256: a4e85b83d14313bae0180437213744c07fdb62a215c970cfca9b5fc92d4aa523

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