Malicious PDF — malware analysis report

Static analysis result for SHA-256 e243c51e51f809ab…

MALICIOUS

PDF

70.5 KB Created: 2021-02-18 17:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4eff91e70c6039fbfa13a0492673f793 SHA-1: b24a37b27a944b1083649e4d111fa7c485a9ce49 SHA-256: e243c51e51f809aba837e087a53af638489ccdb97353db0302566d61d3adbc11
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, appears to be a lure related to an 'energy flow in ecosystems worksheet'. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download 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://baarspo.ru/wix?keyword=bozeman+energy+flow+in+ecosystems+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379241/normal_602d22d779b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fc7496532818.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/rorives/85518838895.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/31470170019.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/82411070332.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/second_agrarian_reform_law_cuba.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/24584380763.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/corbettmaths_equation_of_a_line_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/how_much_does_adt_monitoring_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/browser_video_er_android.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/bihar_board_10th_marksheet_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/house_on_mango_street_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/24201256503.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/chimpreport_news_now.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/la_la_land_audition_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/zedas.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/tisokazususuxezobes.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_off0000d6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 5652 bytes
SHA-256: 13345b3f43ff7896bed4f922f339ac5d1f04f01f76d99062b2d4ba16035c158a
font_01_sfnt_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 10140 bytes
SHA-256: b60358e63e39b16b71cfe1c167b3b21aee2820027756f4442456f19e06f7695e

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