Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6aa623e9f20ae67…

MALICIOUS

PDF

92.2 KB Created: 2021-02-13 06:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6a803c077807701ec21039ddad4f6225 SHA-1: 07ad19b3df3af3fca506b9c8a6f81c0eafa3f0f6 SHA-256: b6aa623e9f20ae67db1b7df7e23457218e67d4a77d0fdeaef68c7afec1a93260
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains text related to downloading an album, and an external URI points to a URL that also appears to be a download lure. The presence of multiple unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=one+direction+up+all+night+album+download+free+zip PDF link annotation
    • http://creditscoretrack.info/zewobemuvudor9mju.pdfIn PDF document text
    • https://dimalosuzilem.weebly.com/uploads/1/3/1/4/131452887/7037020.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hcKjchf/best_dungeon_for_raw_gold_farming_wow.pdfIn PDF document text
    • http://tricitysikhs.com/zodaborettpp9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ff17d20835be.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/imhjOC8/vr_horror_terror_videos_360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fddf62e01ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/gnhaVX6/lifudozefomobigovo.pdfIn PDF document text
    • https://fugikoji.weebly.com/uploads/1/3/4/6/134611078/nowopiwuwijugesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_5fc80d897af96.pdfIn PDF document text
    • http://letxxnx.org/dallas_cowboys_roger_staubach_puntos194aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_600a60ec39afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501514/normal_5fe75c194dab7.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/jjihgjU/walkthrough_of_among_us_gameplay_imposter.pdfIn PDF document text
    • http://axecheat5.xyz/pirolupurej0mu65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467581/normal_6004e36ea6d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_6023d9e5cd44c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fdd13d6ebfb9.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/fakuguvil/jurassic_park_movie_tamil_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/police_application_form_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/atividades_de_alfabetizao_em_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/bogerebapafipadokolupu.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/proyecto_acoso_escolar.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://xdakwah.blogspot.com/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_off00012037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12037 5700 bytes
SHA-256: 2a1275ae82dd58e59f9c005ab288b391735bf8b244e18dd4f59b6be90378cf9f
font_01_sfnt_off00013385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13385 13920 bytes
SHA-256: f3d173c40e375f8bd5269c62baea89243595e1c3f1d167bceadc2902324a781a

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