Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c111bea66065b8f…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 19:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0c22e35fa9b60e592d9952d73af4afb8 SHA-1: a1fa4f615514e8293c0c60d784a1f57fdcd6b06f SHA-256: 2c111bea66065b8f31fb0a832a4737c5277a8183de991ac1bb31ec4dadbcfaf1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/aws?utm_term=lotus+carlton+new+price PDF link annotation
    • http://dimax-matrasy.ru/how_to_draw_eyelashes_on_procreatez0hct.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/werubekevulozoxi.pdfIn PDF document text
    • http://allostar.buzz/bojubawetavamuvebeg0ynka.pdfIn PDF document text
    • http://suluxigexu.22web.org/kindle_supported_file_formats.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/e42e0.pdfIn PDF document text
    • https://tebivozov.weebly.com/uploads/1/3/2/7/132740763/lusuzaputino_letozi.pdfIn PDF document text
    • http://gavowobow.iblogger.org/polar_coordinate_grid.pdfIn PDF document text
    • http://itsnat.space/30708413099b74x6.pdfIn PDF document text
    • http://kellys.space/3828970469i565f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_ab2cb7c0148f4fb298771a55f0acc682.pdf?index=trueIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_96ea2a6172f64c4f90b1020f02e51ad8.pdf?index=trueIn PDF document text
    • http://soxuxemakim.rf.gd/30419926704.pdfIn PDF document text
    • http://nujufotesu.epizy.com/make_your_own_simple_machine.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/pesijefinokasatediko.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_dde61e11ebea46f4aa8bfc018adeb16a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/worem.pdfIn PDF document text
    • http://favukimasinete.rf.gd/antivirus_malware_android_gratis.pdfIn PDF document text
    • http://tunawuzitaxavu.rf.gd/91704775451.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_078981c262614a1eb630da4d83c336a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/turkish_march_violin_sheet_music_free.pdfIn PDF document text
    • http://vofimefokugof.epizy.com/valapidogoxax.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_bb0aeb74f2024d3da30f6c2ca46f9629.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_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 4960 bytes
SHA-256: fccea2315b2fc92c25b3277a2693b8bf5da04f12f75edb8a0b141a76366e5d6a
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 10868 bytes
SHA-256: 71920b1655cc3c24b781f5f216fe7f79dd10b332bfd2f49835544ed24f1010ae

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