Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90fbc2182d21290…

MALICIOUS

PDF

73.7 KB Created: 2021-02-14 21:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9eb1729f09b93d904863031825f81cb SHA-1: ff06d7218d0aa094270d11c75e524199a3b6a3de SHA-256: a90fbc2182d21290295dd0b958df87f818a16b47be6219e73ed475d71f078c23
184 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to known malicious infrastructure, disguised with a lure related to 'Harry Styles meet and greet'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=harry+styles+meet+and+greet+one+direction In PDF document text
    • https://cdn.sqhk.co/jomububorava/0Uhdqgi/sk_lavery_newington_connecticut.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/aicv3g6/gallery_furniture_houston_locations.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/3201083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5fd035cf2351c.pdfIn PDF document text
    • https://towavakivuno.weebly.com/uploads/1/3/5/3/135318123/e95c2.pdfIn PDF document text
    • http://dikebar.22web.org/watox.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/gjhi3Y9/collage_maker_app_android.pdfIn PDF document text
    • https://texejuzaw.weebly.com/uploads/1/3/0/7/130775796/9a2d36e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_601558c489a9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_6010887ed9497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5fc773b3ef6a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_601faeefb4f4b.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/posufij/96095443089.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/factors_affecting_students_academic_performance_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/sing_joyfully_william_byrd_sheet_music.pdfIn PDF document text
    • http://fububosuvakosal.epizy.com/71191803789.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/94458456746.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_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 5320 bytes
SHA-256: 910b5e64e1edbf03b8ec54b783ea8479cbb7f17a4a52058e95371adf39a2b28c
font_01_sfnt_off0000f652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF652 10180 bytes
SHA-256: 2474b01b92beda9220bfaaa6e8d7182799ceedcd4a3be7d1823342cb80852096

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