Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d11d23c0dd385a…

MALICIOUS

PDF

89.6 KB Created: 2021-03-21 08:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1df0d0d59018ff8517b687e50ac25984 SHA-1: 5322e3d07ec593c3c905ea016dd5e6f4bff55e96 SHA-256: e5d11d23c0dd385a19386901c0f82a254470d261591d67f513cd7f8e481e0f2a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to external websites hosted on disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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://jacksth.ru/award?keyword=rationality+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/bajafigotuvi/IojgEII/amazon_music_app_fur_tablet.pdfIn PDF document text
    • https://verorepu.weebly.com/uploads/1/3/4/7/134774070/4768290.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/qbYjauf/cinelux_theatres_gilroy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5ff7f5f312959.pdfIn PDF document text
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/vagizolezagetupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_60475dc0ae24d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fffe18c75051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_603bf048bea66.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/if2gdfS/collage_maker_for_pc_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fcc48f68d67e.pdfIn PDF document text
    • https://vunepixas.weebly.com/uploads/1/3/1/4/131483778/4841750.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/uEhbjh8/73968347410.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/e011675935ec73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_60501bcd39e22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e9e406-5534-4f8b-ae95-53f5b7c2ebc4/28500092251.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/finumunutazodatesa.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/wabiverida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22789f6-f79a-4fe7-84fa-3efe8403ecb7/simeravifunosupimakuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ca4edd-e215-464c-a572-84c116e6e2ac/what_is_the_best_thread_for_a_singer_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db5f890-c3fd-4f58-aa97-aa9836e4f949/zoo_james_patterson_series.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_off00011d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 4872 bytes
SHA-256: 11fea4acf7aba5abe6d520bf594dd5cbb019d1adf1d8600b1b78c4d775a89ca4
font_01_sfnt_off00012de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE6 12392 bytes
SHA-256: 5114a316e131c43dba917fd8b24c96995257b2c09826fc470d15e6f2498dde6b

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