Malicious PDF — malware analysis report

Static analysis result for SHA-256 372159c375d22fde…

MALICIOUS

PDF

77.5 KB Created: 2021-03-09 15:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba5f911096c21c8f66469176f87bb611 SHA-1: df6fa6c0c82deca81c366a41c9e8f84eeb9a44be SHA-256: 372159c375d22fdecdc077312408227e9cc06cb41321644063b08eb496bcb81c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/award?keyword=business+communication+skills+pdf PDF link annotation
    • https://cdn.sqhk.co/kadukugobug/jfChbie/kusojijolot.pdfIn PDF document text
    • http://itnegozio.info/chicago_electric_reciprocating_saw_replacement_partssrlji.pdfIn PDF document text
    • http://flathead.us/what_is_sensory_neuron_simple_definitionmsc7b.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/gjhjjig/imo_video_calling_app_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_603327e373864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_601f067fee057.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/tjcjchg/77690926565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6034bfd14e1ec.pdfIn PDF document text
    • http://kersita.space/descartes_meditation_ii_summaryywrnb.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/Thcjbyv/smash_ultimate_tier_list_maker_6._0.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/hf4jcE9/costco_water_park_slide.pdfIn PDF document text
    • http://comforfemj.fun/salanopav9vtpp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xagazusapikim.epizy.com/nibigaxe.pdfIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_ff56fade0a1b42acb4ecc92077e92c47.pdf?index=trueIn PDF document text
    • http://badivisixeg.epizy.com/gaborofizugexaxurij.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_86bcb03cd94340daabc0fa2d05b7af14.pdf?index=trueIn PDF document text
    • http://tawaxinazaka.rf.gd/dojozonadekupewujoz.pdfIn PDF document text
    • http://gojofim.epizy.com/android_vs_linux_kernel_differences.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_b0c78df545ea402381158d94034d968a.pdf?index=trueIn PDF document text
    • http://kojodidekojamu.rf.gd/jizuxoridesuxovasipeko.pdfIn PDF document text
    • http://fusaxisedafi.rf.gd/9527297418.pdfIn PDF document text
    • http://govezijatin.rf.gd/oracle_pl_sql_developer_salary_in_dubai.pdfIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_0d41aa1221a942e48d58c6419644defb.pdf?index=trueIn PDF document text
    • http://xamopalamusep.rf.gd/daxazuwovejaxenu.pdfIn PDF document text
    • http://zedorufusoli.rf.gd/5242532112.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_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 5316 bytes
SHA-256: 604e8614b6ef96aaf556788e8234e194c041f87319887d3dad98536d88093793
font_01_sfnt_off000104ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EF 10428 bytes
SHA-256: 90b5f0d418d442f04f6666765b6a79e9705b215630472c48d6b873d64a655d56

Open this report in the interactive analyzer, or submit your own file for analysis.