Malicious PDF — malware analysis report

Static analysis result for SHA-256 484b34d1d8bed021…

MALICIOUS

PDF

74.0 KB Created: 2021-03-18 01:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 08627e2d6068132d7ae16b68dbbae7e1 SHA-1: e89aed96d1d921e085803d9a2f4e138abc737f7c SHA-256: 484b34d1d8bed0211456d2dbd9c63c6be9141d0b8a9c8065070339136a2aa53e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though garbled, indicates a lure related to 'angles worksheet pdf', which is likely a pretext to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://golowaki.ru/strik?utm_term=complementary+supplementary+vertical+adjacent+and+congruent+angles+worksheet+pdf PDF link annotation
    • http://dosijefa.mypressonline.com/pibowabi.pdfIn PDF document text
    • http://mazafaka69pussy.online/interview_questions_to_ask_potential_sales_managerruia2.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/harbor_breeze_fans_home_depot.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/gojiwil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_60441639906ed.pdfIn PDF document text
    • http://yewes.space/japamavefosipupigilitixiyh267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_6047e96879abd.pdfIn PDF document text
    • http://itdiscounts.info/salmon_river_ny_fishing_report_douglastonox143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fe7685a482af.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/1785021523.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/142d0759-585f-4bfb-9752-cc88a3336d14/after_we_collided_netflix_release_date_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/93896556249.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/67792797758.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/jujiteroz.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ms_publisher_2019_calendar_template.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/descargar_libro_fisica_2_bachillerato_santillana.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/97563850731.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_eeaf8bb01bc142a99fb7c289f9acc916.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_9a8cc068fa8047eca22277efc6e0a350.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80823ea-7304-4617-ab2d-274a123c3bcc/lejepimolefafasafafivup.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_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 5868 bytes
SHA-256: 6b20086571e569cedf9ba0d94ad4a5ca6fe9c6dd698d5660736b077ff5f53403
font_01_sfnt_off0000f4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F0 10832 bytes
SHA-256: 3e189a1dbacacdfefdf642e9d1f0b648c7ab11a1adf14868c6d21d1f4a4a575c

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