Malicious PDF — malware analysis report

Static analysis result for SHA-256 f269f1e73cfb9617…

MALICIOUS

PDF

73.4 KB Created: 2021-02-24 04:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6216112554ff6bf30a4bdd16b094f4d0 SHA-1: 2c2b0ebda2737ee2e0328a471b368cda22c1a929 SHA-256: f269f1e73cfb96174cb6628b6bc9c87afcc760f295732f2fe3c13b216792c9ed
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to a blinking battery, directing the user to an external URL. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

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://leonvi.ru/strik?utm_term=why+is+my+battery+blinking+20+times PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457000/normal_5fcc2bb0b18c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fee7414370f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_601037e82843d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fdfb6654cc26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_60125dd0afa83.pdfIn PDF document text
    • https://cdn.sqhk.co/folukize/hxjFjfn/social_video_downloader_all_in_one_downloader_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_601d9f7599fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/cidwKDx/game_screen_recorder_apk_android_4._4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486197/normal_602ac96abd4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_601b456f013df.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/XL9hhjO/kefoxuzupajixitafovo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/cieGV4h/kuxafibej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_600125bf66aa0.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gjiijwB/melt_chocolate_in_bowl_over_boiling_water.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/lijopavexanuse/jeduxoruromovoduxakot.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/vevabozadufedutipelev.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/positive_psychology_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/50366621663.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/metlife_group_accident_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/distillation_column_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/basketball_ball_wallpaper_android.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5692 bytes
SHA-256: 9e24ad486fb6803187ea175f0341b7168eb58fc43e3596bb6cf8301ebfc98461
font_01_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 11000 bytes
SHA-256: fd582ed609a60f441ebdf2ced12d7f85e519d906813162a7d8ddb79f863f1cf8

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