Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ed1e3550e0ab5b…

MALICIOUS

PDF

80.1 KB Created: 2021-02-19 17:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ddf5e06bcdda226baf1398d6f71826b2 SHA-1: d3cc380924749c21c4f2f5f0582c60f66bcc7758 SHA-256: 57ed1e3550e0ab5bd1f89b8fd2ea01bfad281b1978835bfc0d58c59907cbf102
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=dungeons+and+dragons+5th+edition+new+books PDF link annotation
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/94174ba58ac5f24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5ff8bc8ba978e.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/iibjfjj/rajisujebozewuvug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6014410dbade7.pdfIn PDF document text
    • http://lalat.space/684561414622cxz9.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/576564503737h37l.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ii2Egho/free_mp3_downloads_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_60155afd65bd6.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/w93Lhg7/devil_evolution_catalog_novel.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/yja2hel/75584404424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_602504b0d02fc.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/7fd778972ca6e8.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/janowojojexapodadiz.pdfIn PDF document text
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/e8ac38.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/gta_5_doomsday_heist_2_player_guidek8hxz.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://s3.amazonaws.com/fonazuzixagizir/jira_dashboard_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/igcse_business_studies_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/bilin.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/bestie_lyrics_by_abochi.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/99705467713.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/fufafuwakafo.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/motaveridiluniwakararis.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/covid_numbers_ny_state.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_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 5356 bytes
SHA-256: 09aaac3a6c9975ffecfdb8da3fb3dc92d76cb6f73f57918520e5cddb6941d404
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10620 bytes
SHA-256: 5f363bed438e78931400f17da16f070eb1d10e6c7d65fbea218f921fb88e49d5
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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