Malicious PDF — malware analysis report

Static analysis result for SHA-256 863fe8d4fd7ae83b…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 19:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 92b7a01aa888d4faeefd095348ef3671 SHA-1: fd8eda8bc7c661cebe833ae514366aeb764b0ce2 SHA-256: 863fe8d4fd7ae83b2353767b3939ab9710a023d0cbec0e46c0c74f111d50c3c9
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. It contains an embedded URL pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a book review, a common social engineering tactic. The presence of embedded URLs and the overall malicious classification strongly indicate 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://baarspo.ru/strik?utm_term=the+how+of+happiness+book+review PDF link annotation
    • https://cdn.sqhk.co/vivakawibaki/ge7Z6nv/sakaketufesogonudoza.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/cMgdFWj/63523205138.pdfIn PDF document text
    • http://olymptrade.buzz/81012508704v1kjn.pdfIn PDF document text
    • http://znalomstvavip.site/warframe_how_to_get_ignis_wraithmyzb7.pdfIn PDF document text
    • http://pet-guru.shop/vifojakedomopepoxofapab5dxs0.pdfIn PDF document text
    • http://goproits.com/how_to_fix_cracked_picture_framesfnlw.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/egfjdjj/34154372288.pdfIn PDF document text
    • http://mini-cam-v2.club/vujogisubixowif2cuq4.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/nodetuxapabara/check_sheet_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/hypertensive_emergency_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/android_auto_new_ui_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/13870741948.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/flight_simulator_x_planes.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/luxomukinomudo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/ergonomics_risk_assessment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/pesimow.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_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 5264 bytes
SHA-256: 84b412f99d715156f1faf79c5256b53f255b1bf6ceefe9579eea425804f6013a
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 10640 bytes
SHA-256: 5f99cfa7e750db6c8677605617faa7dbf12b2908d97ec73f33278b35b51b40e5

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