Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadc7cb71ead2d0f…

MALICIOUS

PDF

68.0 KB Created: 2021-03-19 22:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3a265cb0f5ff4d16c2810dd84b7a12f9 SHA-1: ea19f3d89fdd0daccc23e9a31458d1b04b7615c2 SHA-256: eadc7cb71ead2d0fa40a33e6883fb4cc13d1a48873ea3ff7eea0e309245c3858
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links, many pointing to disposable domains and configured with UTM parameters, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of external URIs and the link farm heuristic point towards a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://gimoguvi.ru/wix?keyword=i+wish+i+had+one+in+spanish PDF link annotation
    • http://max-lifting.store/2036903610312m7f.pdfIn PDF document text
    • http://aarbuz.space/22850532069o6dv9.pdfIn PDF document text
    • http://dkblogin-de.com/jusewivozibevizuxadmes8.pdfIn PDF document text
    • http://znalomstvavip.site/54607691246fkcb9.pdfIn PDF document text
    • http://servempieza.site/marketplace_foods_minot_nd_jobsokptb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://turebegifazuxa.epizy.com/7103368297.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_0f0e846c9a984d5ab95a8607d7f885b4.pdf?index=trueIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_46930ffcb9bb431db5b2c80556084620.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_54e92159fc554413a896edf3cae38a91.pdf?index=trueIn PDF document text
    • http://lobexejabavusut.epizy.com/39758046926.pdfIn PDF document text
    • http://xuxamasisovuku.epizy.com/78318271768.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_91fabecd2c8a4756a426acb08d8f427b.pdf?index=trueIn PDF document text
    • http://jibapasugaxelo.epizy.com/letitovimikexapuni.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_5c43131665cc43d58fb361d87e65b12a.pdf?index=trueIn PDF document text
    • http://zasuzutan.rf.gd/ieee_template_document.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_71b92a2435c04062a955592855011c33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/bopezesokusaxofir.pdfIn PDF document text
    • http://velododitimof.rf.gd/bharat_movie_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/addition_and_subtraction_mental_strategies_worksheets.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_fd6bf37dcc064d4ba1420bbdbc119a2b.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_off0000ccf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF0 4948 bytes
SHA-256: 1a9dd28f399fb7d1f72fa7dc5f111a07459addef82b65b4d8980afe22cf4b4df
font_01_sfnt_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 11048 bytes
SHA-256: 7c82add3ac45b5eb8b87bd76c97ca75347d9b0c85faa2ad56107ca220106d194

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