Malicious PDF — malware analysis report

Static analysis result for SHA-256 972928ccc5f65390…

MALICIOUS

PDF

76.0 KB Created: 2021-03-27 14:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 19fdc1bacd5e95c0bbe29b536def4923 SHA-1: 8a10213d09a7f35cc9600802fc6c134cf7751d96 SHA-256: 972928ccc5f65390052ac84aaa8055bd3c7200c0d98556d4eff4d39076178d6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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=how+to+draw+a+superhero+step+by+step PDF link annotation
    • http://gavixefelij.iblogger.org/37971704752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_604720739f655.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/cjggiii/send_http_post_request_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_603ea8626cd5d.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/what_is_the_third_step_in_the_decision-making_process_brainly.pdfIn PDF document text
    • http://libebilefopa.iblogger.org/earthquakes_and_faults_crossword_puzzle_answer_key_grade_8.pdfIn PDF document text
    • https://cdn.sqhk.co/xidodaxu/ehe7mhb/jatutuvokoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/ghijf0U/73470773177.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/de_que_se_trata_la_obra_cien_aos_de_soledad_resumen.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/n6bhcyA/dirac_live_digital_room_correction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fc832178a383.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/TQhdKTi/wozuxutezowiximabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_60192538108e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_d38d248a74924c3abc72ea7152546f09.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_4a6e414eee874237bae3f6c06cc13e6f.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_fb4c696f8d9242ed8eaed8436c2efa3f.pdf?index=trueIn PDF document text
    • http://setovoj.onlinewebshop.net/katalog_kabel_supreme_nyfgby.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_8bb36cf425ad4502aa172bdd25ed2597.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_c59a441717fc4f66b016d7db51798001.pdf?index=trueIn 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_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5308 bytes
SHA-256: 9ad5b2dc6c8e91fc90a564ea0a215a0a3ecc5f7fb83aa0abb27bb65d3d9dcdd4
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 10984 bytes
SHA-256: 7b26ac8ab3f07cdecbd8ecca45f43f7a77a6e3884df9f14512467fb2149c8bf1

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