Malicious PDF — malware analysis report

Static analysis result for SHA-256 6976f4af3ea72acb…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 12:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62564c7530f2ae259abfea09b312a72 SHA-1: 73436a51baad4f8fa9d8ba840b48ec448ad3c4d9 SHA-256: 6976f4af3ea72acb65c266fd39961f12bed9bba06956114f1f54f9368a8e934b
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document's structure and embedded links are consistent with a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ponafet.ru/123?utm_term=property+inventory+report+template
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/wogipesalub-biwaxu-sikenikuw-wikepo.pdf
    • http://lovemecompletely.com/reading_strategies_for_students_with_autismtflsb.pdf
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/1789160.pdf
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5fff52b56a213.pdf
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fdd885b9000e.pdf
    • http://naliputa.mywebcommunity.org/how_to_use_html_basic_tags.pdf
    • https://lesoloruvurer.weebly.com/uploads/1/3/6/0/136028926/206058d536a.pdf
    • https://durafozo.weebly.com/uploads/1/3/0/7/130740533/megusivula.pdf
    • http://usacreditscore.info/sig_sauer_p229_legion_rxp_sao_e29r-9-legion-sao-rxpf8q4u.pdf
    • http://sodowetan.mywebcommunity.org/how_do_you_write_a_performance_improvement_plan_example.pdf
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6022cdaf30dc9.pdf
    • http://callup.today/75620097279w0wni.pdf
    • https://cdn.sqhk.co/kukisigafumi/gfjeUhj/best_police_scanner_app_for_my_area.pdf
    • https://cdn-cms.f-static.net/uploads/4491151/normal_60293b640100b.pdf
    • https://cdn.sqhk.co/fuluzagile/ffsihji/cat_game_the_cats_collector_mod_apk.pdf
    • http://tapasin.sportsontheweb.net/fawoviw.pdf
    • https://romadixisom.weebly.com/uploads/1/3/2/6/132681692/9279136.pdf
    • http://mmmmmme.space/the_trials_of_apollo_book_sixdbxsv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_b040807982ad47c894329cd9bf71e80c.pdf?index=true
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_dd8befd703684dff8c0e7b0014ab3ac2.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_662d211bdc014e2b97f9a7374f0ab12b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd1.bin
a950df7bdd33fcf1271849653cca5729dc2d3678d082cc49e7956cb076104af4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 4736 bytes
font_01_sfnt_off0000fdce.bin
1153aeb8e1ea27d0c475527ac003e39fef50f93bc2b4d2d4fd3a41cc9b54041c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 11184 bytes
font_02_sfnt_off000123f7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 4324 bytes