Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed6a617d309b27b…

MALICIOUS

PDF

80.5 KB Created: 2021-04-27 08:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 55398ac7d5d71771afef5f93f2b35888 SHA-1: 4c987d797d41e4fd52148711516c2c16c1a9735f SHA-256: 2ed6a617d309b27be1433b566f6c95776b2b6808d6338626376a39e79b9160ee
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URIs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

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://nipisod.ru/strik?utm_term=what+is+local+government+autonomy+in+nigeria PDF link annotation
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/zojekuwesizesiwumoxosavo.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/qErhbs0/fidarutexavirabakibar.pdfIn PDF document text
    • http://springital.fun/moped_tire_repair_near_me8dkyk.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/dukulalibovo.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/cqF3wRw/zutirewo.pdfIn PDF document text
    • http://lifeeuro.info/evenflo_car_seat_base_safezone0jhrs.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Ijdov7n/super_mario_run_world_1-_1_black_coins.pdfIn PDF document text
    • https://cdn.sqhk.co/gumorefose/eibQEhj/lawanepotadenazeled.pdfIn PDF document text
    • http://esclick.pro/13220607417997pv.pdfIn PDF document text
    • http://beremoter.online/adverbs_of_manner_list_examplesuynsi.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/how_long_to_cook_a_stuffed_20_lb_turkey_in_a_roasternlayo.pdfIn PDF document text
    • http://dimax-matrasy.ru/kukedabaju02ye4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/18792583679.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/blender_low_poly_tutorial.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_5cb3c7b3353f478687cffdae76f6f35a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/63359422299.pdfIn PDF document text
    • https://753261b1-dd5c-46f5-86c3-7cf81ddbfa5b.filesusr.com/ugd/353d00_ef6b569f1b0044a9bc6f48bd50413031.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vozitixotojoxesomato.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/swot_analysis_report_of_an_organization.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 5268 bytes
SHA-256: ee552d34134745deada720eaa5d2d78a59448afd22426ec0539ce1f3033523e1
font_01_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 10736 bytes
SHA-256: a13cb62e6ebcbadc41b7f1c9362b99be9342991d8c2a54c37742b67b1bd50964
font_02_sfnt_off00012616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12616 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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