Malicious PDF — malware analysis report

Static analysis result for SHA-256 b169a3eed623fa11…

MALICIOUS

PDF

74.2 KB Created: 2021-02-12 09:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c143f667dff349f257a073954ee8e046 SHA-1: eda7be80c7dbbe3c12206d306e6be65f308d01bc SHA-256: b169a3eed623fa117becb0527fc35bf4d936c0310753e9e202e85c8080e816e0
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 URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to an alarm clock manual. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://maypoin.ru/wix?keyword=hmdx+alarm+clock+manual+hx-b322 PDF link annotation
    • http://idealicait.website/pukowadelipedukobimoteuvh56.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/gjchbjc/busajamepub.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/vavapekadoliti/anonytun_pro_2._6_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/music_ringtones_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/biological_science.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/events_leading_to_the_civil_war_worksheet.pdfIn PDF document text
    • http://jasukapikubov.rf.gd/84686755539.pdfIn PDF document text
    • http://jutuzeforuz.rf.gd/html_email_responsive_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/6320674013.pdfIn PDF document text
    • http://togipumenotu.epizy.com/90340974058.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/gobofijiwewedamekisadel.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/asphalt_8_pc_windows_7_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6E 6412 bytes
SHA-256: 10f3fe43765f440c15a73b289c6af61e65ae10475f72da94918b45df094cc377
font_01_sfnt_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 5560 bytes
SHA-256: 579e5f6ab0d76c93f7028c00b29b6a9c6a5bcc957e4e8c20c7045d8baf07ce4c
font_02_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 10856 bytes
SHA-256: dbf37b55c26d56107bbe34b755861d672953b10f2e07895a635f18744c7b4840