Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7b482a547ef55e…

MALICIOUS

PDF

79.8 KB Created: 2021-05-19 11:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9ba50a4936531eb70fd62e9dbfc86077 SHA-1: 3a1a28022a1c12e65361b7423ae9dce201e7e456 SHA-256: bb7b482a547ef55e42a38191aa1942c471bada15a07adb816a39e65d8e36c7f5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or credential harvesting 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://bologen.ru/wb?keyword=perrine PDF link annotation
    • https://vefoduga.weebly.com/uploads/1/3/5/3/135302220/xetefidipu_kixirabo_nunubotuxipute_mobobimerorofil.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/gagiduzix-deguwu-weroripiboj.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/3588130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fe386c65ba61.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/weribevudexixapewiko.pdfIn PDF document text
    • http://tawesukosipot.22web.org/android_auto_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6039a033ac359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_60344134acb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_605d77204c777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1baedeba-bcd8-413c-a96b-50aab1940cfd/family_feud_game_download_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/cbse_improvement_exam_application_form_date.pdfIn PDF document text
    • http://xunawikavamenu.epizy.com/83124501450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3d94bd-5cbc-4100-af15-044833de1d6f/89368900517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb38c88-9333-4ec1-a3df-633456930023/download_game_free_fire_mod_apk_2020_august.pdfIn PDF document text
    • http://lagufezoseni.rf.gd/preschool_books_about_life_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/audacity_for_android_apk.pdfIn PDF document text
    • http://ravesezubepad.epizy.com/auditor_fiscal_da_receita_federal_edital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c08654d-eeb1-4f6e-bc13-b5ef62fcd67c/28942520179.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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 5056 bytes
SHA-256: 763210fbfd18ac5366189328fb2810f99b87e67e9bff6921c52aa7f31618af8a
font_01_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 11012 bytes
SHA-256: f460c6d686894e77a961a88802db4b028b4ade00a3eb2c44f337f722e82d931f
font_02_sfnt_off00012345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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